HomeMy WebLinkAboutOrdinance 493 Backflow Prevention
ORDINANCE NO. 493
AN ORDINANCE OF THE CITY OF WINTER SPRINGS, FLORIDA,
PROVIDING FOR THE ADOPTION AND APPROVAL OF A BACKFLOW
PREVENTION AND CROSS-CONNECTION CONTROL PROGRAM TO
PROTECT THE HEALTH OF WATER CONSUMERS; PROVIDING FOR
CONTROLLING OF ACTUAL AND/OR POTENTIAL BACKFLOW AND
CROSS-CONNECTIONS THROUGH THE ADOPTION OF A CROSS-
CONNECTION CONTROL MANUAL; PROVIDING FOR THE INSPECTION
AND TESTING OF BACKFLOW PREVENTION DEVICES; PROVIDING
FOR FEES; PROVIDING FOR ARTICLE IV. POTABLE WATER,
DIVISION I OF CHAPTER 19, BACKFLOW PREVENTION AND CROSS
CONNECTION CONTROL PROGRAM; PROVIDING PENALTIES;
PROVIDING FOR CONFLICTS, SEVERABILITY AND AN EFFECTIVE
DATE.
WHEREAS, it is the responsibility of a water purveyor to
provide a safe potable water to its customers; and
WHEREAS, protecting these potable water supplies against con-
tamination or pollution resulting from backflow of objectionable fluids through
cross-connections; and
WHEREAS, the water purveyor is responsible for protecting these
supplies at the service connection by isolating within the customers premises
pollution or contamination that may result from backflow through cross-
connections; and
WHEREAS, the City Commission has determined it necessary,
advisable and of critical importance to public health, safety, and welfare to
adopt a backflow prevention and cross-connection control program.
NOW, THEREFORE, BE IT ORDAINED BY THE CITY COMMISSION
OF THE CITY OF WINTER SPRINGS, FLORIDA:
SECTION I: The Code of the City of Winter Springs, Florida is
hereby amended by the adoption of Article IV, Chapter 19, Division I, Backflow
Prevention and Cross-connection Control Program to read as follows:
Sec. 19-150. INTENT
(a) The enactment of this Ordinance is necessary in accordance
with Section 17-555.360(1), (2), and (3), Florida Administrative Code which
provides in part "Community Water Systems shall establish a routine cross-
connection control program for the purpose of detecting and preventing cross-
connections that create or have the potential to create an imminent and substantial
danger to public health. Such program shall be developed using accepted practices
of the American Water Works Association guidelines as set forth in the A.W.W.A.
manuals M14, "Backflow Prevention and Cross-Connection Control", and "Cross-
Connections and Backflow Prevention", 2nd Edition. Upon detection of a
prohibited cross-connection both community and non-community water systems
shall either eliminate the cross-connection by installation of an appropriate
backflow prevention device acceptable to the Department, or discontinue service
until the contaminant source is eliminated."
Sec. 19-151. MANUAL OF CROSS-CONNECTION CONTROL
(a) The City adopts by reference the City of Winter Springs
"Manual of Cross-Connection Control" dated
the manual is hereby required.
Sec. 19-152. CHANGES TO MANUAL OF CROSS-CONNECTION CONTROL
Compliance with
(a) The Winter Springs City Commission may by Resolution,
periodically revise the Winter Springs Manual of Cross-Connection Control as
may be deemed necessary for the public health, safety and welfare of the users of
the City water system or for protection of the Utility system, and to effect
cost effective implementation of the provision of the manual.
Sec. 19-153. ADMINISTRATION
(a) The City's Utility Director or his designee shall cause
inspections to be made of all properties within the City served by a potable
water supply where cross-connection with the potable water supply is deemed
possible. The frequency of inspections and reinspections based on potential
health hazards involved shall be as established by the backflow prevention and
cross-connection control manual, and in no case shall be less than once a year.
Fees and charges shall be as set forth in the City of Winter Springs "Manual
of Cross-Connection Control."
Sec. 19-154. INSPECTION AND TESTING
(a) Duly authorized employees of the City shall be permitted
reasonable access to any building, structure, or property served by a
connection to public potable water supply within the City of Winter Springs,
for the purpose of inspecting the piping system or systems. The refusal of
such access when requested may result in the discontinuance of service.
Sec. 19-155. TESTING OF BACKFLOW PREVENTION DEVICES
(a) Public potable water system customers shall bear all
expenses of installing, testing and maintaining the backflow prevention device.
Installation, testing maintenance, and repair of backflow prevention devices
shall be performed by certified personnel approved by the City's Utility Depart-
ment. Copies of all testing, maintenance, and repair records shall be sent to
the City's Utility Department immediately after work is performed. A record
of all backflow prevention device installations, testings and repairs within
the City shall be kept on file and up to date by the City's Utility Department.
Sec. 19-156. CROSS-CONNECTION VIOLATIONS/PENALTIES
(a) That any person or customer found guilty of violating any
of this ordinance or any written order of the City of Winter Springs or pursuance
thereof, shall be guilty of a misdemeanor punishable by either a fine of not
more than Five hundred dollars ($500.00) or not more than ninety (90) days
jail sentence, or both for each and every day that such violation continues.
SECTION II. CONFLICTS
This Ordinance does not supersede any City of Winter Springs
Code, but is supplementary to them provided that where conflicts exist the
more restrictive provisions shall apply.
SECTION III. SEVERABILITY
The provisions of this Ordinance are declared to be separable
and if any section, sentence, clause or phrase of this Ordinance shall for any
reason be held to be invalid or unconstitutional, such decision shall not
affect the validity of the remaining sections, sentences, clauses and phrases
of this Ordinance, but they shall remain in effect, it being the legislative
intent that this Ordinance shall stand notwithstanding the invalidity of any
part.
SECTION IV. EFFECTIVE DATE
This Ordinance shall take effect immediately upon its final
passage and adoption.
Passed and adopted this 23rd day of July, 1990.
CITY OF WINTER SPRINGS
LEANNE M. GROVE, MAYOR
ATTEST:
Mary T. Norton
CITY CLERK
First Reading June 25, 1990
Posted June 27, 1990
Second Reading and Public Hearing July 23, 1990
MANUAL OF
CROSS CONNECTION CONTROL
JULY 1990
CITY OF WINTER SPRINGS
WINTER SPRINGS WATER AND SEWER
EAST/WEST
TABLE OF CONTENTS
Manual Section
Pages
SECTION 1 - INTRODUCTION
1.01 Purpose
1 . 02 Leg a 1 Aut h 0 r i ty
1.03 Causes of Backf10w
SECTION 2 - OBJECTIVES
1
2
3
5
SECTION 3 - RESPONSIBILITY
3.01 Cross-Connection Control
3.02 Consumers
3.03 Backf10w Prevention Device Installer
SECTION 4 - POLICY
6
6
7
8
SECTION 5
5.01
5.02
5.03
- INSPECTIONS
Frequency
New Construction
New and Existing Facilities
9
1 0
10
10
SECTION 6 - DEFINITIONS
SECTION 7 - APPLICABLE STANDARDS AND DESCRIPTIONS
FOR BACKFLOW PREVENTION DEVICES
Applicable Standards
Abbreviations for Protective Devices
Types and Descriptions of Backflow
Prevention Devices
7.1 Table of Types and Applications
7.04 Facilities Requiring Backflow
Prevention Devices
7.05 Typical Plumbing Arrangements Requiring
Backf10w Prevention Devices
7.01
7.02
7.03
22
23
23
25
27
32
CONTENTS
(Continued)
SECTION 8
8.01
8.02
8.03
8.04
- TESTING OF BACKFLOW
General Requirements
Parallel Installation
Records
Testers
PREVENTION DEVICES
38
39
40
41
SECTION 9 - RESULTS OF NON-COMPLIANCE 41
SECTION 10 - PROVIDING PENALTY FOR VIOLATIONS 42
SECTION 11 - INSTALLATION AND CONSTRUCTION STANDARDS 42
11.1 Diagram of Reduced Pressure Devices 44
11.2 Diagram of Air-Gap Separation 45
11.3 Diagram of Atmospheric Vacuum Breaker 46
11.4 Diagram of Pressure Type Vacuum Breaker 47
11.5 Diagram of Double Check - Single Service 48
11.6 Diagram of Double Check - Dual Service 49
11.7 Diagram of Reduced Pressure - Single Service 50
11.8 Diagram of Double Check - 311,411 51
11.9 Diagram of Double Check - 611, 811 52
11.10 Diagram of Double Check, 611,811 Single 53
Service
11.11 Diagram of Double Check - Vertical Installation 54
11.12 Diagram of Reduced Pressure - 611,811 55
11.13 Di agram of Reduced Pressure - 611, 811 56
Appendix A - Ordinance 493: Backf10w Prevention and
Cross-Connection Control Program
SECTION 1
MANUAL OF CROSS CONNECTION CONTROL
INTRODUCTION
A cross connection is defined by the American Water
Works Association (AWWA) as: "any connection or
structural arrangement between public or a consumer's
potable water system and any non-potable source or
system through which backflow can occur. Bypass
arrangements, jumper connections, removable sections,
and other temporary or permanent devices through which
or because of which, backflow can occur are considered
cross connection."
Backflow, literally a reversal in the normal direction
of flow within a water system, is what turns a cross
connection into a health hazard. Consequently, cross
connection and the chance of backflow must be
eliminated to prevent these "unseen hazards" from
degrading the quality of water that water providers
strive to maintain.
1.01 Purpose
The purpose of a cross connection control program
is to prevent diseases and contamination from
entering the potable water distribution system and
the water we drink. The program aims to protect
the consumers and the City from those water using
establishments which could possibly reduce the
quality and safety of the municipal water supply
through backflow and cross connection.
1
1.02 Legal Authority
Winter Springs has adopted Ordinance 493, Backflow
Prevention and Cross-Connection Control Program.
This ordinance is the local legal authority for
the program described herein and incorporates this
manual by reference. A copy of Ordi nance 493 is
contained as Attachment A.
The Safe Drinking Water Act, signed by President
Ford on December 16, 1974, created new authority
through a chain of laws and regulations that
resulted in the State Requirement (Florida Safe
Drinking Water Section 403.850 - 403.864, Florida
Statutes) for all public water systems to have a
cross connection control program. Contained
within the rules of the Department of
Environmental Regulation (D.E.R.), Chapter 17-555
(Formerly 17-22). The State of Florida, on
November 9, 1977, adopted the following policy:
"Community water systems are required to establish
a routine cross connection program for the purpose
of detecting and preventing cross connections that
create an imminent and substantial danger to the
public health by and from contamination due to the
cross connection. Upon detection of a prohibited
cross connection, both community and non-community
water systems shall either eliminate the
cross-connection by installation of an appropriate
backflow prevention device acceptable to the
Department of Environmental Regulation (D.E.R.) or
discontinue service until the contaminate source
is eliminated." 17.555.360 (Formerly 17-22.160
F.A.C.).
2
1.03 Causes of Backflow
Where cross connections exist, protection against
backflow is needed to reduce the possibility of
contamination. The causes of backflow cannot
usually be eliminated completely since backflow is
often initiated by accidents or unexpected
circumstances. However, some causes of backflow
can be partially controlled by good design and
informed maintenance. Listed below are the major
causes of backflow as outlined under the two types
of backflow - back siphonage and backpressure.
A. Backsiphonage
Backsiphonage is caused by reduced or
negative pressure being created in the supply
piping. A major cause of backsiphonage is
the interruption of the supply pressure.
This will allow negative pressure to be
created by water trying to flow to a lower
point in the system. Another cause is
undersized piping. If water is withdrawn
from a pipe at a very high velocity, the
pressure in the pipe is reduced and the
pressure differential created can cause water
to flow into the pipe from a contaminated
source. The potable water supply can thus
become contaminated due to backsiphonage of
contaminates into the potable water supply
creating the potential for serious health
problems.
3
The principal causes of backsiphonage are:
1. A line repair or break which occurs at a
lower elevation than the service point.
2. Undersized pipe.
3. Lower pressure in a water main due to a
high water withdrawal rate such as
fire-fighting, water main flushing, or
water main breaks.
4. Reduced supply main pressure on the
suction side of a booster pump.
B. Backpressure
Backpressure may cause backf10w to occur
where a potable water system is connected to
a non-potable system of piping, and the
pressure in the non-potable system. High
pressures may be created by means of pumps,
boilers, etc. There is a risk of non-potable
water being forced into the potable water
system whenever these types of cross
connections are not properly protected.
The principal causes of backpressure are:
1. Booster pump systems designed without
backf10w prevention devices.
2. Potable water connection to boilers and
other pressure systems without backf10w
prevention devices.
3. Connections with a non-potable system
which may, at times have a high pressure.
4
4. Non-potable water stored in tanks or
plumbing systems which, by virtue of
their elevation, would create head
sufficient to cause backflow if pressure
were lowered in the public system.
SECTION 2 - OBJECTIVES
The objectives of the City of Winter Springs Water
Department Cross Connection Control Program are as follows:
1. To protect the City water supply from the possibility
of contamination by containing within its consumer's
private water system, contaminates or pollutants which
could, under adverse conditions, backflow through
uncontrolled cross connections into the public water
system.
2. To eliminate or control existing cross connections,
actual or potential, between the consumer's on-premise
potable water system and non-potable water systems
plumbing fixtures and industrial piping systems.
3. To provide an inspection program of cross connection
control, which will systematically and effectively
control all actual or potential cross connections which
exist presently or may exist in the future.
5
SECTION 3 - RESPONSIBILITY
3.01 Cross Connection Control
Under the rules of the Florida Department of
Environmental Regulation, Section 17.550 relating to
cross connections. The water purveyor has the primary
responsibility to prevent water from unapproved
sources, or any other substances, from entering the
public water system upon detection of a prohibited
cross connection. The Winter Springs Water Department
is directed to either eliminate the cross-connection by
requiring the installation of an approved backflow
device or discontinue service until the contaminate
source is eliminated.
3.02 Consumers
The consumer's responsibility starts at the point of
delivery from the public potable water system and
includes all of his water system. The consumer, at his
own expense, shall install, operate, and maintain
approved backflow prevention devices. The City of
Winter Springs Water Department shall cause all
backflow prevention devices to be inspected and tested
on an annual basis. The testing fee per each test
performed by the City's certified backflow prevention
device technician shall be in accordance with the City
Code of Ordinances. The consumer shall maintain
accurate records of repairs made to the backflow
prevention devices and provide the Water Department
with copies of such records. The records shall be on
forms approved or provided by the Winter Springs Water
Department.
6
In the event of accidental pollution of consumer's
potable water system due to backflow on or from
consumer's premises, the owner shall promptly take
steps to confine further spread of pollution or
contamination within the consumer's premises, and shall
immediately notify the Water Springs Water Department
of the hazardous condition.
3.03 Backflow Prevention Device Installer
The installer's responsibility is to make proper
installation of backflow prevention devices in
accordance with the manufacturer's installation
instructions and those furnished by the Winter Springs
Water Department. See examples of backflow prevention
device installation on Pages 47 through 59. The
installer is also responsible to make sure a device is
working properly when it is installed, and is required
to furnish the following information to the Cross
Connection Control Program immediately after a reduced
pressure principle backflow preventer (RP), double
check valve assembly (DCVA) or pressure vacuum breaker
(PVB) is installed:
1. Service address where device is located.
2. Owner.
3. Description of device's location.
4. Date of installation.
5. Type of device.
6. Manufacturer.
7. Model number.
8. Serial number.
7
After installation, all RP's, DCVA's, and PVB's shall
be inspected and tested by the City of Winter Springs
to ensure proper operation of these devices.
SECTION 4
POLICY
The Winter Springs Water Department will provide continuing
inspection of all industrial and commercial users of potable
water, where it is probable that a pollutional health or
system hazard may be created or where materials dangerous to
health are handled in tanks, piping systems, or other
vessels on the premises or where the water system is
unstable and cross connections may be installed.
The following regulations to cross connection will apply:
1. Should the connection be between two (2) approved
public water supplies, common gate or check valve may
be used provided this has the approval of both water
supplies and the Florida Department of Environmental
Regulation.
2. Should the connection be between an approved public
water supply and a service or other water supply not
hazardous to health but not meeting the standards of
the approved water supply, and not cross-connected
within its system with a potentially dangerous water or
liquid, an approved double check valve assembly (DCVA)
may be used.
8
3. Should the connection be between an approved public
water supply and a service or other water supply which
has or may have any material in the water dangerous to
health, that is, or may be handled under pressure,
subject to negative pressures, protection shall be by
an approved air-gap separation {AG}. The air-gap shall
be located as close as practicable to the service cock
or other connection to approved supply. All piping
between such connections and air-gap shall be entirely
visible. If these conditions cannot reasonably be met,
the public water supply shall be protected with an
approved reduced pressure principle backflow device
{RP}, provided the alternative is acceptable to the
water purveyor.
SECTION 5 INSPECTIONS
5.01 Frequency
Due to changes in models or components of equipment,
methods of manufacturing and additions to plants,
buildings, etc., water use requirements undergo
continual change. As a result, new cross connections
may be installed and existing protection may be
bypassed, removed, or made otherwise ineffective;
therefore, an annual or more frequent detailed
inspection of all industrial, commercial and in some
cases privately owned water usage is required.
9
5.02 New Construction
All new construction plans and specifications for
industrial or commercial facilities shall be made
available to the Water Department Cross Connection
Control Program to determine the degree of possible
cross connection hazards.
5.03 New and Existing Facilities
In order to determine the degree of hazard to the
public potable water system, a survey will be made of
the consumer's presently installed water system. This
survey need not be a detailed inspection of the
location or disposition of the water lines, but can be
confined to establishing the water uses on the
premises, the existence of cross connections, and the
availability of auxiliary or used water supplies. On
site inspections are made of new and existing
facilities and should any devices or plumbing changes
be required, a follow-up inspection will be made of the
same facilities at a later date.
SECTION 6
DEFINITIONS
AIR-GAP SEPARATION - The term air-gap separation shall mean
a physical separation between the free-flowing discharge end
of a potable water supply pipeline and an open or
non-pressure receiving vessel. An approved air-gap
separation shall be a distance of at least two (2) times the
diameter of the supply pipe measured vertically above the
top rim of the vessel - with a minimum distance of one (1)
i nc h.
1 0
APPROVED - a) The term approved, as herein used in reference
to a water supply, shall mean a water supply that has been
approved by the Florida Department of Environmental
Regulation. b) The term approved, as herein used in
reference to air-gap separation, a double check valve
assembly, or a reduced pressure principle backflow
prevention device or other backflow prevention device or
method, shall mean as approved by the City of Winter Springs
Water Department.
AUXILIARY INTAKE - The term auxiliary intake shall mean any
piping connection or other device whereby water may be
secured from a source other than that normally used.
BACKFLOW - The term backflow, shall mean the undesirable
reversal of the flow of water or other liquids, mixtures,
gases, or other substances into or towards the distribution
piping of a potable supply of water from any source or
sources.
BACKFLOW PREVENTION DEVICE - A backflow prevention device,
shall mean any effective device, method, or construction
used to prevent backflow into a potable water system. The
type of device used shall be based on the degree of hazard,
either existing or potential, and identified by the
condition which it is designed to prevent.
11
BACKFLOW PREVENTION DEVICE - APPROVED - The term approved
backflow prevention device shall mean a device that has been
investigated and approved by the City of Winter Springs
Water Department and has been shown to meet the design and
performance standards of the American Society of Sanitary
Engineers (ASSE) and/or the American Water Works Association
(AWWA). The approval of backflow prevention devices by the
City Water Department is based on a favorable report by an
approved testing laboratory, recommending such an approval.
BACKFLOW PREVENTION DEVICE TESTER - CERTIFIED - The term
backflow prevention device tester shall mean a person who
has proven his/her competency to the satisfaction of the
City Water Department. Each person who is certified to make
competent tests or to repair, overhaul, and make reports on
backflow prevention devices shall be conversant with
applicable laws, rules and regulations, have had at least
two years of experience under a licensed plumber or have
other qualifications which in the opinion of the City Water
Department are equivalent, and shall have attended and
successfully completed the TREEO (Training, Research, and
Education for Environmental Occupations) Certification
Program for Backflow Prevention Device Testers, or other
USCFHR or DER approved program.
BACK PRESSURE - Backpressure shall mean any elevation or
pressure in the downstream piping system (by pump, elevation
of piping, or stream and/or air pressure) above the supply
pressure at the point of consideration which would cause or
tend to cause a reversal of the normal flow through a
backflow prevention device.
1 2
BACKSIPHONAGE - Backsiphonage shall mean a reversal of the
normal direction of flow in the pipeline due to a negative
pressure (vacuum) being created in the supply line with the
backflow source subject to atmospheric pressure.
CONSUMER - Any person, firm or corporation using or
receiving water from the City's water system.
CONTAMINATION - The term contamination shall mean an
impairment of the quality of the City water supply by
sewage, industrial fluids, or any other foreign substance to
a degree which creates an actual hazard to the public health
through the potential spread of disease or toxic substances.
CRITICAL LEVEL - The term critical level shall mean the
marking of a vacuum breaker which determines a minimum
elevation above the flood level rim of the fixture or
receptacle served at which the device may be installed.
CROSS CONNECTION - The term cross connection shall mean any
unprotected connection between any part of a water system
used or intended to supply water for drinking purposes and
any source or system containing water or substances that is
contaminated or cannot be approved as safe, wholesome and
potable for human consumption. Bypass arrangements, jumper
connections, removable sections, swivel or change-over
devices and other temporary or permanent devices through
which or because of which "backflow" can or may occur are
considered to be cross connections.
13
_,~..,~__-.....-~",'~h~-'~""~'_'~'P_--'<~"__""",",,'O_'_~__'___'_
DOUBLE CHECK VALVE ASSEMBLY - The term double check valve
assembly means an assembly of at least two independently
acting, approved, spring and weight loaded check valves with
resilient discs for the intended purpose of preventing
backpressure backflow in a water supply line. Assembly is
usually furnished with test cocks for field testing the
tightness of the check valves. Some assemblies include a
"vacuum breaker" to admit atmospheric air downstream of the
assembly.
FIRE SPRINKLER SYSTEM - A sprinkler system for fire
protection purposes is an integrated system of underground
and overhead piping designed in accordance with fire
protection and engineering standards. The installation
includes one or more water supplies.
FLOOD LEVEL RIM - The edge of the receptacle from which
water overflows is the flood level rim.
HAZARD, DEGREE OF - The term degree of hazard is a
qualification of what potential and actual harm may result
from cross connections within a water-using facility.
Establishing the degree of hazard is directly related to the
type and toxicity of contaminates that could feasibly enter
the public water supply water system and can be classified
as either a "pollutional" (non-health) or a "contamination"
(health) hazard.
14
HAZARD, HEALTH - The term health hazard shall mean an actual
or potential threat of contamination or pollution of a
physical or toxic nature to the public potable water system
of the consumer's potable water system to such a degree or
intensity that there would be a danger to health.
HAZARD, PLUMBING - The term plumbing hazard shall mean a
plumbing type cross connection in a consumer's potable water
system that has not been properly protected by a vacuum
breaker, air-gap separation, or other device. Unprotected
plumbing type cross connections are considered to be a
health hazard. They include, but are not limited to, cross
connections, to toilets, sinks, laboratories, wash trays,
domestic washing machines, and lawn sprinkler systems.
Plumbing type cross connections can be located in many types
of structures, including homes, apartment houses, hotels,
and commercial and industrial establishments. Such a
connection, if permitted to exist, must be properly
protected by an appropriate type of cross connection control
assembly.
HAZARD, POLLUTION - The term pollution hazard shall mean an
actual or potential threat to the physical properties of the
water system or the potability of the public or the
consumer's potable water system, but which would not
constitute a health or system hazard, as defined. The
maximum degree of intensity of pollution to which the
potable water system could be degraded under this definition
would cause a nuisance, or be aesthetically objectionable,
or could cause minor damage to the system or its
appurtenances.
1 5
HAZARD, SYSTEM - The term system hazard shall mean an actual
or potential threat of severe damage to the physical
properties of the public or the consumer1s potable water
system, or of a pollution or contamination which would have
a protracted effect on the quality of the potable water in
the system.
HEALTH AGENCY - The term health agency shall mean the health
authority having jurisdiction.
HOSPITAL - The term hospital shall mean an institution,
place, building, or agency which maintains and operates
organized facilities for one or more persons for the
diagnosis, care, and treatment of human or animal illness,
including convalescence care during and after pregnancy, or
which maintains and operates organized facilities for any
such purpose and to which persons may be admitted for an
overnight stay or longer. "Hospital" includes sanitariums,
nursing homes, maternity homes, dentistries, laboratories,
and veterinarians.
INDUSTRIAL FLUID - The term industrial fluid shall mean any
fluid or solution which may be chemically, biologically, or
otherwise contaminated or polluted in a form or
concentration such as would constitute a health, system,
pollution, or plumbing hazard if introduced into an approved
water supply. This may include, but is not limited to:
polluted or contaminated used waters; all types of process
water and "used waters" originating from the public potable
water system which may deteriorate in sanitary quality;
chemicals in fluid form; plating acids and alkalies;
16
circulated cooling waters connected to an open cooling tower
and/or cooling water that are chemically or biologically
treated or stabilized with toxic substances; contaminated
natural waters such as from wells, springs, streams, rivers,
bays, harbors, seas, irrigation canals or systems, etc.;
oils, gases, glycerine, parafins, caustic and acid
solutions; and other liquid and gaseous fluids used in
industrial or other processes or for fire fighting purposes.
INDUSTRIAL PIPING SYSTEM, CONSUMER'S - The term consumer's
industrial piping system shall mean any system used by the
consumer for transmission of or to store any fluid, solid,
or gaseous substance other than an approved water supply.
Such a system would include all pipes, conduits, tanks,
receptacles, fixtures, equipment, and appurtenances to
produce, convey, or store substances which are or may be
polluted or contaminated.
INLET - The open end of the water supply pipe through which
the water is discharged into the plumbing fixture shall be
the inlet.
LABORATORY, APPROVED TESTING - Reference to an approved
testing laboratory shall mean the Foundation for Cross
Connection Control Research of the University of Southern
California, or any other laboratory having the equivalent
facilities for both the laboratory and field evaluation of
the devices approved by the American Water Works Association
or American Society of Sanitary Engineers.
1 7
PLUMBING OFFICIAL - The term plumbing official shall mean
the individual, board, department, or agency established and
authorized by state, county, city, or other political
subdivision created by law to administer and enforce the
provisions of the Standard Plumbing Code as adopted or
amended.
PLUMBING SYSTEM - The term plumbing system includes the
water supply and distribution pipes; plumbing fixtures and
traps; soil, waste, and vent pipes; building drains and
building sewers, including their respective connections,
devices, and appurtenances within the property line of the
premises; and water-treated or water-using equipment.
POINT OF DELIVERY - See Service Connection
POLLUTION - Pollution shall mean an impairment of the
quality of the water to a degree which does not create an
actual hazard to the public health, but which does adversely
and unreasonably affect it for domestic use.
REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTION DEVICE (RP) -
The term approved reduced pressure principle backflow
prevention device (RP) shall mean a device containing within
its structure a minimum of two independently acting,
approved check valves, together with an automatically
operating pressure differential relief valve located between
the two check valves. The first check valve reduces the
supply pressure a predetermined amount, so that during
norm a 1 f low and at c e s sat ion 0 f norm a 1 f low, the pre s sur e
18
between the checks shall be less than the supply pressure.
In case of leakage of either check valve, the differential
relief valve, by discharging to the atmosphere, shall
operate to maintain the pressure between the checks less
than the supply pressure. The unit shall include tightly
closing shut-off valves located at each end of the device
and each device shall be fitted with properly located test
cocks.
SERVICE CONNECTION - The term service connection shall mean
the terminal end of the public potable water system, i.e.,
where the water purveyor loses jurisdiction and sanitary
control over the water at its point of delivery to the
consumer's water system. If a meter is installed at the end
of the service connection, then the service connection shall
mean the downstream end of the meter. There shall be no
unprotected takeoffs from the service line ahead of any
backflow prevention device located at the point of delivery
to the consumer's water system.
VACUUM BREAKER - NON PRESSURIZED (ATMOSPHERIC) TYPE - A
vacuum breaker - nonpressurized type is a vacuum breaker
which is designed for use where it will not be subject to
static line pressure.
VACUUM BREAKER - PRESSURE TYPE - A vacuum breaker - pressure
type is a vacuum breaker designed to operate under
conditions of static line pressure.
19
WATER, POTABLE - The term potable water shall mean water
from any source which has been investigated by the Florida
Department of Environmental Regulation and which has been
approved for human consumption by the health authority
having jurisdiction. Potable water is water of excellent
quality intended for drinking, cooking, and cleansing uses.
This grade of water would conform to the water quality
requirements of state and federal regulatory agencies.
WATER PURVEYOR - The term water purveyor shall mean the
utility owner or operator of the public potable water system
supplying an approved water supply to the public. The
utility shall be one that is operating under a valid permit
from the Department of Environmental Regulation. As used
herein the terms water purveyor and City of Winter Springs
Water Department may be used synonymously.
WATER SUPPLY, APPROVED - The term approved water supply
shall mean any public potable water supply which has been
investigated and approved by the Florida Department of
Environmental Regulation. The system must be operating
under a valid health permit. In determining what
constitutes an approved water supply, the Department of
Environmental Regulation has reserved final judgment as to
its safety and potability.
20
WATER SUPPLY, AUXILIARY - The term auxiliary water supply
shall mean any water supply on or available to the premises
other than the purveyor's approved public potable water
supply. These suxiliary waters may include water from
another purveyor's public potable water supply or any
natural source such as a well, spring, river, stream, etc.,
or "used water" or "industrial fluids". They may be
polluted or contaminated or objectionable and constitute an
unacceptable water source over which the water purveyor does
not have sanitary control.
WATER SUPPLY, UNAPPROVED - The term unapproved water supply
shall mean a water supply which has not been approved for
human consumption by the health agency having jurisdiction.
WATER SYSTEM, CONSUMER'S - The term consumer's water system
shall include any water system located on the consumer's
premises, whether supplied by the public potable water
system or an auxiliary water supply. The system or systems
may be either a potable water system or an industrial piping
system.
WATER SYSTEM, CONSUMER'S POTABLE - The term consumer's
potable water system shall mean that portion of the
privately owned potable water system lying between the point
of delivery and point of use. This system will include all
pipes, conduits, tanks, receptacles, fixtures, equipment,
and appurtenances used to produce, convey, store, or use
potable water.
21
WATER SYSTEM, PUBLIC POTABLE - The term public potable water
system shall mean any publicly or privately owned water
system operated as a public utility under a recent health
permit to supply water for domestic purposes. This system
will include all sources, facilities, and appurtenances
between the source and the point of delivery such as valves,
pumps, pipes, conduits, tanks, receptacles, fixtures,
equipment, and appurtenances used to produce, convey, treat,
or store a potable water for public consumption or use.
WATER, USED - The term used water shall mean any water
supplied by a water purveyor from a public potable water
system to a consumer's water system after it has passed
through the point of delivery and is no longer under the
control of the water purveyor.
SECTION 7
APPLICABLE ~TANDARDS AND DESCRIPTIONS FOR BACKFLOW
PREVENTION DEVICES
7.01 Applicable Standards
The following list identifies specifications or
requirements of approving agencies recognized by
the City of Winter Springs. All backf10w
prevention devices and condition of cross
connection control shall be in compliance with the
standards set forth by one or more of the
following agencies. The City reserves the right
to state which standards apply if and when
conflicts between standards arise.
22
AWWA -
ASSE -
FCCCHR
American Water Works Association - #C506
and manual M14.
American Soceity of Sanitary Engineers.
of USC - University of Southern California,
Foundation for Cross Connection and
Hydraul ic Research (Manual of Cross
Connection Control, Seventh Edition,
June, 1985).
Southern Building Code Congress (Standard
Plumbing Code).
SBCC -
7.02 Abbreviations for Protective Devices
AG - Approved Air-Gap
AVB - Approved Atmospheric Vacuum Breaker
DCVA - Approved Double Check Valve Assembly
HBVB - Approved Hose Bibb Vacuum Breaker
PVB - Approved Pressure Vacuum Breaker
RP - Approved Reduced Pressure Principle Backflow
DCB - Approved Dual Check Valve
7.03 Types and Descriptions of Backflow Prevention
Devices
The following definitions apply to hazardous
conditions existing at a site where backflow
prevention may be required.
23
Degree of
Hazard
Definition
Low
A condition where a polluting
substance may come in contact with
potable water aesthetically affecting
the taste, odor or appearance, but
not hazardous to health (non-toxic),
e.g., pollution hazard).
Moderate
to high
A condition where a polluting
substance may come in contact with
potable water creating a health
hazard, causing sickness or death
(toxic), (e.g., system hazard,
plumbing hazard, health hazard).
Table 7.1 lists the types and applications of
backflow prevention devices, a brief description
of each device, and typical installation
conditions.
24
TYPE & APPLICATION
DOUBLE CHECK VALVE
ASSEMBLY (FOR LOW
HAZARD CONNEC~)
TABLE 7.1
TYPICAL DESCRIPTION
TWO INDEPENDENT CHECK VALVES,
SUPPLIED WITH SHUT-OFF VALVES
AND BALL TYPE TEST COCKS.
APPLICABLE INSTALLATION
FOR USE ON FIRE SPRINKLER
PROTECTION SYSTEMS AND
CROSS CONNECTIONS SUBJECT
TO BACK PRESSURE WHERE
THERE IS A LOW POTENTIAL
HEALTH HAZARD OR
NUISANCE. CONTINUOUS
PRESSURE.
AIR-GAP (FOR MODERATE
TO HIGH HAZARD CROSS
CONNECTION) .
VERTICAL SEPARATION OF 2"
DIAMETER OF THE SUPPLY PIPE
ABOVE VESSEL OVERFLOW RIM.
SEPARATION MUST BE MIN. 1"
OR GREATER.
ALL CROSS CONNECTIONS
SUBJECT TO BACK PRESSURE
OR BACKSIPHONAGE WHERE
THERE IS A HIGH POTENTIAL
HEALTH HAZARD FROM
CONTAMINATION.
ATMOSPHERIC VACUUM
BREAKERS (LOW HAZARD)
SINGLE FLOAT AND DISC WITH
LARGE ATMOSPHERIC PORT.
CROSS CONNECTION NOT
SUBJECT TO BACK PRESSURE
OR CONTINUOUS PRESSURE,
INSTALL AT LEAST 12"
ABOVE HIGHEST OUTLET.
PROTECTION AGAINST
BACKSIPHONAGE ONLY.
HOSE BIBB VACUUM BREAKERS
FOR RESIDENTIAL AND
INDUSTRIAL HOSE SUPPLY
OUTLETS.
SINGLE CHECK WITH
ATMOSPHERIC VACUUM
BREAKER VENT.
INSTALL DIRECTLY ON HOSE
BIBB, SERVICE SINKS AND
WALL HYDRANTS. NOT FOR
CONTINUOUS PRESSURE.
PRESSURE TYPE VACUUM
BREAKERS (FOR MODERATE
TO HIGH HAZARD CROSS
CONNECTION.
SPRING LOADED SINGLE FLOAT
AND DISC WITH INDEPENDENT
1ST CHECK. SUPPLIED WITH
SHUT-OFF VALVES AND BALL
TYPE TEST COCKS.
25
THIS VALVE IS DESIGNED
FOR INSTALLATION IN A
CONTINUOUS PRESSURE
POTABLE WATER SUPPLY
SYSTEM 12" ABOVE THE
OVERFLOW LEVEL OF THE
SYSTEM BEING SUPPLIED.
PROTECTION AGAINST
BACKSIPHONAGE ONLY, NOT
BACKPRESSURE.
REDUCED PRESSURE
PRINCIPLE BACKFLOW
PREVENTER (FOR HIGH
HAZARD CROSS COWNrCTION.
TWO INDEPENDENT CHECK
VALVES WITH INTERMEDIATE
RELIEF VALVE. SUPPLIED
WITH SHUT-OFF VALVE AND
BALL TYPE TEST COCKS.
ALL CROSS CONNECTIONS
SUBJECT TO BACK PRESSURE
OR BACKSIPHONAGE, WHERE
THERE IS A HIGH POTENTIAL
HEALTH HAZARD FROM
CONTAMINATION. CONTINUOUS
PRESSURE.
DUAL CHECK VALVE
BACKFLOW PRE VENTER
(FOR LOW HAZARD
APPLICAfIUNS).
TWO INDEPENDENT CHECK VALVES.
CHECKS ARE REMOVABLE FOR
TESTING.
CROSS CONNECTION WHERE
THERE IS A LOW POTENTIAL
HEALTH HAZARD AND
MODERATE FLOW
REQUIREMENTS.
Air-gap separations or vacuum breakers require continuous attention and maintenance to
ensure proper operation. The use of a hose section to bridge an air-gap is strictly
forbidden.
26
7.04 Typical Facilities Requiring Backf10w Prevention
Devices
1. All hospitals shall have an RP device
installed on all the main service connections
supplying potable water to such premises.
2. Medical buildings, sanitariums, dentistries,
laboratories, veterinarian facilities,
morgues, mortuaries, autopsy facilities,
nursing and convalescent homes, and clinics
shall have an RP or DeVA, depending upon
degree of hazard, installed at the service
connection. The hazard normally to be found
in a facility of this type include cross
connections between the consumer's water
system and contaminated or sewer connected
equipment such as bedpan washers, flush valve
toilets, and urinals, autoclaves, specimen
tanks, sterilizers, pipette tube washers,
cuspidors, aspirators, autopsy, and mortuary
equipment.
27
3. All buildings, plants, or other structures
having a source of unapproved water piped
into such buildings, plants, or other
structures with the potential of being
interconnected to the public supply, shall
have an RP installed at the main supply line
servicing their premises.
4. All buildings, hotels, apartment houses,
public and private buildings, or any other
structures having unprotected cross
connections shall have an RP or neVA,
depending upon degree of hazard, installed at
the service connection to any premises where
multi-storied public buildings such as
hotels, apartments houses, offices, or loft
buildings are operated or maintained if the
building have unprotected cross connections,
sewer pumping facilities, auxiliary water
supplies, or other like sources of
contamination which could create a potential
hazard to the public water system. Also, an
approved backflow prevention device should be
installed at the service connection to any
premises where there are existing cross
connections or where potential cross
connections exist or where it is expected
that the consumer may make piping or
equipment changes which would result in the
installation of a cross connection.
28
5. All water front facilities and industries
shall have an RP or DCVA, depending upon the
degree of hazard, installed at their service
connection to any premises where there are
piers, docks, or other water front
facilities, or industries, or where water
from a river, stream, irrigation, ditch,
canal, lake, etc., is available to be used on
the premises, except that backflow protection
may not be required on facilities which do
not have docking facilities, or which do not
have outlets available for supplying water to
docks, or facilities, or which do not have
outlets available for supplying water to
docks of facilities which have not been used
for such auxiliary water supplies as
irrigation, fire protection, air
conditioning, cooling, swimming pool supply,
or other such purpose.
6. All manufacturers of chemicals which are
toxic may be required at the discretion of
the water purveyor to install an RP.
7. All sewage treatment plants shall have an RP
installed on main potable water service lines
serving such plants.
29
8. Dairies and cold storage plants shall have an
RP or DeVA, depending upon the degree of
hazard, installed on the service connection
to any premises where a dairy, creamery, ice
cream plant, cold storage, or ice
manufacturing plant is operated or
maintained, provided such a plant has on the
premises an auxiliary water supply,
industrial fluid system, sewer handling
facilities, or other similar source of
contamination which if cross connected to,
would create a hazard to the public system.
The hazards normally found in a plant of this
type include cross connections between the
consumer's waste system and reservoirs,
cooling towers, and circulating system which
may be heavily contaminated with bird
droppings, vermin, algae, bacterial slimes,
or toxic water treatment compounds.
9. Schools and colleges shall have a DeVA or RP
installed at the service connection where
water is used to supply chemical,
bacteriological, and biological laboratories;
or where the water is used to supply separate
irrigation systems; or where there are
unprotected sewer cross connections.
30
10. In commercial car washing installations,
potable make-up water lines to reclaim water
pits shall have an AG separation. All
potable water connections to fluids such as
bug cleaners, tire cleaners, and wax and soap
solution make-up tanks shall have an AG
separation. If this is not possible due to
the design of equipment, an RP shall be
installed on the main water service
connection.
11. All buildings or premises where security
requirements or other prohibiting restriction
make it impossible or impractical to make a
complete inside cross connection survey, the
public water system shall be protected
against backflow from the premises or
building by an RP installed on the main
service connection serving the building or
premises.
NOTE:
Any device, equipment, or situation not
covered by this cross connection policy where
water is connected or used which may
constitute a potential health hazard, will be
handled at the discretion of the water
purveyor or his authorized agent.
31
7.05 Typical Plumbing Arrangements Requiring BFPD
Note references to SBCC, Standard Plumbing Code
(SPC)
1. Fixture Inlets or Valved Outlets - Fixture
inlets or valved outlets with hose
attachments which may constitute a cross
connection, shall be protected by the proper
approved vacuum breaker (AVB, HBVB etc.)
installed at least six (6) inches above the
highest point of usage and located on the
discharge side of the last valve. Fixtures
with integral vacuum breakers manufactured as
a unit may be installed in accordance with
their approved requirements. (SPC Sec.
1204.3.4).
2. Industrial Fluid or Processes Water - Potable
water pipelines connected to industrial
piping systems or to equipment containing
industrial fluid, sewage, used or processed
water, or any other potentially contaminated
liquid shall be protected by installing an RP
in the interconnecting lines or by an AG
separation.
3. Air Condition Cooling Tower - Potable water
inlet shall have an AG separation of twice
the inside diameter of the inlet line or a
minimum of two inches above the flood level
rim.
32
4. Aspirators and Ejectors - Shall have an AVB
or PVB, depending upon the degree of hazard,
on the faucet from which these devices are
attached or operated. (SPC Sec. G104.6).
5. Automatic Film Processors - Potable water
lines connected directly to an automatic film
processor shall be protected by an AG or a
DCVA.
6. Bath Tub with Hose Attachments - Shall have
an AVB at faucet.
7. Bedpan Washer - Shall have an AVB or PVB
installed in accordance with the Standard
Plumbing Code. (SPC Sec. G104.6).
8. Boiler Connection - Potable water connection
to boiler feed water system which contains
conditioning chemicals shall either be made
through an AG at make-up tank, or have an RP,
or DCVA, depending upon the degree of
hazard. Feed connections to steam and hot
water heating boilers, heat exchangers, etc.
which do not contain chemical additives shall
have either an AG or OCVA. (SPC Sec.
1204.3.5).
NOTE: This hazard is critical because little or no
attention is given to the maintenance of
vacuum breakers and they are frequently
removed from the line; steam generating
33
facilities and lines are frequently
contaminated with boiler compounds such as
pentachlorophenol, cyc10hex1amine, etc. A
very particular hazard is the possibility of
steam getting back into the domestic system,
causing a health hazard.
9. Booster Pumps - All booster pumps shall be
provided with a low pressure cut-off unless
other acceptable provisions are made to
prevent the creation of low or negative
pressures in the piping system. (SPC Sec.
1211.6).
1 O.
Colonic Irrigators or Douche
Shall have an AVB installed.
G104.7).
Attachments -
(SPC Sec.
11. Dark Rooms (Photographic) - All threaded
faucets shall be protected with an AVB, PVB,
or HBVB.
12. Dishwashing Machine - Shall be connected with
an AVB or PVB on both hot and cold water
supply lines in accordance with the Standing
Plumbing Code. (SPC Sec. 915,1101.2,
1204.1).
13. Dip Tanks and Vats - Potable water inlet
shall have an AG separation twice the inside
diameter of the inlet or a minimum of two
inches above the flood level rim.
34
___",-~",__..,...._,._w____ .....,,,..,. ___~.._"",.;.,,__.__~"'_"_~"__"''''"'
14. Garbage Disposer - Potable water supply lines
connected directly to garbage disposer shall
be equipped with an AVB or PVB. (SPC Sec.
912.1).
15. Drinking Fountains - Shall have an AG
separation. (SPC Sec. 913.2).
16. Fire Sprinkler Drains - Shall have an AG
separation to the sewer.
17. Flushing Floor Drains - Shall have an AVB
installed. (SPC Sec. G104.6).
18. Flush Valve Water Closets, uringals, and
Bidets - Shall have a vacuum breaker
installed in accordance with the Standard
Plumbing Code. (SPC Sec. 1204.3.1).
19. Foot and Sitz Bath - Shall have an AG
separation or an AVB installed. (SPC Sec.
G104.7).
20. Hydrotherapy Baths - Shall have an AVB
installed at water connection. (SPC Sec.
G104.7).
21. Janitors, Mop or Slop Sink - With threaded
hose faucet shall be equipped with an AVB
before faucet.
22. Lawn Sprinkler Systems - Shall have an AVB,
PVB, or DCVA installed. (SPC Sec. 1204.3.3).
35
23. Pipette Washer - Shall have an AVB installed
or AG separation installed on faucet.
24. Private Wells - Shall not be interconnected
unless the public supply is protected by an
RP at the service connection.
25. Potable Water Make-Up Line - to chill water
loops, heating loops, purge units,
condensers, converters, and condensate tanks
should be equipped with DPw/IAV, DCVA, or RP,
depending upon degree of hazard.
26. Serrated Faucets - Shall be equipped with an
AVB, PVB at the faucet. If goose neck faucet
is used "laboratory faucet type vacuum
breaker" is acceptable. (SPC G104.6).
27. Shampoo Basin Hose Rinse - Shall have an AVB
installed.
28. Sinks and Bathtub Faucets - Shall have an AG
separation above flood level rim.
29. Sterilizers - Shall have an AG separation or
AVB or PVB installed.
30. Stills - Shall have an AG separation.
31. Swimming Pool Fill Line - Shall have an AG
separation above the flood level rim or a
DCA.
36
32. Wash-UP Sinks with Threaded Faucets - Shall
have an AVB or HBVB installed.
33. Washdown Hose Faucet - Shall have an AVB,
PVB, or HVBV installed on faucet.
34. Washing Machine Drain Lines - Shall have an
AG separation to sewer. (SPC Sec. 919).
35. Water Supply Inlets - In pits, tanks,
trenches, tubs, vats, or any other place that
could become flooded with contaminated
liquids shall have an AG separation above the
flood level rim.
36. Water Operated Presses, Elevators, or Other
Similar Pressure producing Equipment - Shall
have an RP installed.
37. X-Ray Developing Tank - Shall have an AG
separation or an AVB or PVB.
NOTE: Any device, equipment, or situation not
covered by this cross connection policy,
which may constitute a potential health
hazard, will be examined for appropriate
treatment by the Water Department or
authorized agent.
37
SECTION 8
TESTING OF BACKFLOW PRE VENTERS
8.01 General Requirements
As part of a complete cross connection control
program, the City of Winter Springs will require
the testing of reduced pressure backf10w
prevention devices (RP), double check valve
assemblies (DCVA), and pressure vacuum breakers
(PVB) with a thorough inspection and operational
test at least once a year. Proper field test
procedures with calibrated gauge equipment must be
used by certified personnel. The customer-user
may have these devices tested by certified private
contractor with the results forwarded to the City
of Winter Springs Water Department.
These inspections and tests and any maintenance or
repair required as a result of the test, shall be
at the expense of the customer-user and shall be
performed by the device's manufacturer's
representative, certified licensed plumber or by a
certified device tester. All devices, failing to
meet latest performance standards set forth by the
American Water Works Association (AWWA 506),
American Society of Sanitary Engineers (ASSE
1013), or the Foundation for Cross Connection
Control at the University of Southern California
(Manual of Cross Connection Control), shall be
repaired and retested promptly. Devices
repeatedly found not to met the Standards are to
be replaced with new devices.
38
If such testing indicates wear or other
malfunctions, the devices shall be overhauled.
Such an overhaul should consist of the replacement
of all seats, diaphragms, gaskets, etc. which are
subject to wear, and any other parts found to be
worn or otherwise in questionable condition.
8.02 Parallel Installation
All backf10w ~revention devices with test cocks
are required to be tested once per year. Testing
requires a water shutdown usually lasting five (5)
to twenty (20) minutes. For facilities that
require an uninterrupted supply of water, and when
it is not possible to provide water service from
two separate meters, provisions shall be made for
a "parallel installation" of backf10w prevention
devices.
During testing, one device is left on while the
other is being tested. Usually the two devices
are sized one device size smaller than the service
line, one 2 inch device or two 1-1/2 inch
devices. One 8-inch device or two 6-inch devices.
The City of Winter Springs Water Department will
not accept an unprotected bypass around a backf10w
preventer when the device is in need of testing,
repair, or replacement.
Installation requiring continuous service and a
parallel installation of backf10w prevention
devices are listed as follows:
39
1. Aircraft and Missile Plants.
2. Automotive Plants.
3. Auxil i a ry Water Systems
a. Private Water Systems
b. IIUsed Waterll and IIIndustria1 F1uidsll.
4. Beverage Bottling Plants.
5. Breweries.
6. Buildings - Hotels, apartment houses, public
and private buildings, or any other
structures having unprotected cross
connections.
7. Canneries, Packing Houses, and Reduction
Plants.
8. Chemical Plants - Manufacturing, processing,
and compounding or treatment.
9. Hospitals, Medical Buildings, Sanitariums,
Morgues, Mortuaries, Autopsy Facilities,
Nursing and Convalescent Homes and Clinics.
10. Laundries and dye work.
11. Paper and Paper Product Plants.
12. Power Plants.
13. Restricted, Classified, or Other Closed
Facil ities.
14. Schools and Colleges.
8.03 Records
The water purveyor will notify the customer when tests
are to be performed and results of the tests shall be
supplied to the customer. A full report shall be made
available of any maintenance or repairs to backf10w
prevention devices and are to be routed promptly to the
City of Winter Springs Cross Connection Control
Program.
40
8.04 Testers
To ensure continued satisfactory operation of a
backflow prevention device, testing shall be performed
by individuals who are certified and understand the
design and intended operation of the device. Only
certified device testers will be accepted by the City
Water Department, to perform testing of backflow
prevention devices if customer wishes to have them
tested by a private contractor. The contractor or
individuals who are certified must provide the City of
Winter Springs Water Department with a valid Backflow
Prevention Technician certification through or from the
University of Florida. A program to train individuals
in the testing of backflow preventers is available
regionally and nationally. The water purveyor will
have the necessary information on how to register and
participate in these programs.
SECTION 9
RESULTS OF NON-COMPLIANCE
A letter listing all potential cross connections found
during the inspection will be sent to the owner or
authorized agent of the owner of the building or premises,
stating that correction should be made and setting a
reasonable time for compliance. Upon failure of the owner
or authorized agent of the owner of the building or premises
to have the defects corrected by the specified time and the
water purveyor may cause the water service to the building
on premises to be terminated.
41
The water purveyor may cause discontinuance of water service
if a reduced pressure backf10w prevention device has been
bypassed or failed to be properly maintained as required by
the City of Winter springs and/or policy statements
contained in this manual. In general, violations involving
moderate-to-high degrees of hazard must be corrected
immediately. Violations involving low degrees of hazard
shall be corrected within sixty (60) days of the date of
deficiency was brought to the attention of the
customer-user. If discontinuance of service is required,
the matter shall be simultaneously brought to the attention
of the City Manager.
SECTION 10
PROVIDING PENALTY FOR VIOLATIONS
Any person found in violation of any provision of the Cross
Connection Control code herein adopted, shall be puniShed as
provided in the City Ordinance.
SECTION 11
INSTALLATION AND CONSTRUCTION STANDARDS
INSTALLATION
Manufacturer's installation instructions must be followed to
ensure proper operation and to protect the equipment's
warranty. General installation guidelines are as follows:
1. The device should be installed in a horizontal position
and have at least 12" between the bottom of the device
and final grade or floor.
42
2. Lateral clearance around the device must be provided to
facilitate testing, maintenance, and replacement.
3. Two devices should be installed in parallel for any
facility that must have uninterrupted flow during
device testing or repair (e.g., hospitals).
4. Though not recommended, devices may be installed in
pits that are well drained; no part of a device should
ever be under water.
5. If a device is installed inside a building, a floor
drain is helpful to eliminate spillage caused by
testing or flushing.
6. Since the relief valve on a RP will periodically drip
or spit and may dump, the relief vent may be fitted
with a drainline if spillage is objectionable or
hazardous (e.g., electrical hazards). The end of the
drain line must terminate 12" above ground or flood
level and be clearly visible and accessible.
7. The device should be protected against freezing.
8. Shut-off valves should be of the OS and Y type.
9. The assembled piping should be thoroughly flushed
before installing the device.
10. The device should be adequately supported.
WS
MANUAL
43
~.
I
CONSTRUCTION STANDARDS
11.1 Types of Backflow Prevention Devices
The following pages illustrate the various types of
backflow prevention devices and the typical methods
of installation (outdoor).
Backflow prevention devices installed indoors wit! vary
in the method of installation based on location and
configuration of the existing or proposed piping system.
.---.. .-..--" ..--..;:
AIR GAP
FLOOR DRAIN
~.
U
TYPICAL INDOOR REDUCED PRESSURE
BACKFLOW PREVENTER INSTALLATION
44
)
11.2 Air Gap Separation
(.
f_"
2 X 0 OR I" MIN.
PROPERTY LINE
t
RECEIVING
TANK
PUMP
SUPPLY
~INE FEED
'a. LINE
NOTE: 1. An air gap separation means the unobstructed
vertical distance through the free atmosphere
between the lowest opening from any pipe of
faucet supplying water to a tank, plumbing
fixture, or other device and the flood level or
overflow rim of the receptacle.
2. The "approved air gap separator" shall be at
least double the diameter of the supply pipe
measured vertically above the overflow rim of
the vessel and in no case shall the gap be less
than one (1) inch in diameter.
45
--,
)
11.3 Atmospheric Vacuum Breaker (A.V.B.)
L
12" MINIMUM
t 'll
~~\\\
SUPPLY, cD'
~
SPRINKLERS
::J[JO -
NOTE: 1. The atmospheric vacuum breaker cannot be
installed where it will be subjected to back
pressure. It can only provide protection against
backsiphonage of non-toxic pollutants.
2. Each device shall be installed in an accessible
location to facilitate inspection and servicing.
3. Each A.V.B. shall be installed downstream of the
last shut-off valve and at least 12 inches above
the highest sprinkler head of outlet. (No valves
may be located downstream of the device).
4. Under no circumstances should the A.V.B. be
installed where it will be under continuous
operating pressure for more than 12 hours in
any 24 hour period.
46
----..
)
11.4 Pressure-Type Vacuum Breaker (P.V.B.)
L-
12"
\~ SPRINKLER~
. -of
, .. .
.,. '. ....
_.~
. -
NOTE: 1. The pressure vacuum breaker (P.V.B.) cannot
be installed where it will be subjected to
backpressure. It provides protection against
backsiphonage of both pollutants and
contaminants.
2. Each P.V.B. shall be installed in an accessible
location to facilitate inspection and servicing.
3. Each P.V.B. shall be installed on the main line to
the irrigation system and at least 12 inches
above the highest sprinkler head or outlet.
(Valves may be located downstream from the
device.)
47
-,
11.5 Double Check or Reduced Pressure Backflow Preventer
Single Service: 3/4",1",1-1/2",2"
411
t
FINAL
GRADE
4
METER
t
. SERVICE
~;
M A T E R I A L S
ITEM OUANT. 0 E S C RIP T I o N
I I 2" BACKFLOW PREVENTER ASSEMBLY
2 2 2" X NOM. NIPPLES - BRASS or PVC
3 2 2" X 900 ELBOWS-GALVANIZED or PVC
4 2 2" X VARIES RISER -GALVANIZED or PVC
5 * PEA GRAVEL
6 * PLASTIC LINER
NOTE:
Installation shown above is for a 2" service.
Change piping materials accordingly for service
size.
48
)
11.6 Double Check or Reduced Pressure Backflow Preventer
Dual Service: 3/4", 1 ", 1-1/2", 2"
. CD BAr.:KFLOW
.PREVENTER
w
M A T E R I A L S
ITEM QUANT. DESCRIPTION
J 2 2" BACK FLOW PREVENTER ASSEMBLY
2 4 2" X 6" NIPPLES- GALVANIZED or PVC
3 4 2" X 900 ELBOWS- GALVANIZED or PVC
4 6 2" X 4" NIPPLES-GAL VANIZED or PVC
5 2 2" RISER-GALVAN IZED
6 2 2" . TEES -GALVANIZED
7 * PEA GRAVEL
8 * PLASTIC LINER
NOTE:
Installation shown above is for a 2" service.
Change piping materials accordingly for service
size.
49
. .
"
')
11.7 Reduced Pressure Backflow Preventer
Single Service: 3",4"
F'INAL
GRADE
~
M A T E R . I A L S
ITEM OUANT. 0 E S C R I P T I 0 N
I I 3", 4" VALVE, REDUCED PRESSURE
Z 2 3" 4" VALVE, GATE, C.I., F-F
,
3 I 3" 4" NIPPLE, GALV. (12" LONG) (OPT.)
4 4 3", 4" ELBOW, GALV. - 900
~ 2 3", 4" FLANGE, STEEL PIPE, SCREW-TYPE
6 2 3", 4" PIPE, GALV. (42" LONG)
T I I 3" 4" NIPPLE, GALV. (6" LONG)
,
NOTE:
Field adjust and cut Item 6 to the proper length.
50
)
11.8 Double Check Backflow Preventer
Single Service: 3",4"
M A- T E R . I A L S
ITDI- OUAH.T. D.E S C R I P T I 0 N
. I I 3~, ." VALVE, COUBLE CHECK
Z Z 3", ." VALVE. GATE. c.1.. F-F
3 I I 3' .' NIPPI..E. GAL.V. (12" L.ONG) (OPT.)
. I.. , 3", ." ELBOW. GAL.V. - 900
50 2 3'" '4" Fl..ANGE. STEEl.. PIPE. SCREW-TYPE
& Z I 3", 4" PIPE. GAl.V. (42" l.ONG)
T I 3'". 4" NIPPI..E. GAl.V. (6" l.ONG)
NOTE:
Field adjust and cut Item 6 to the proper length.
51
')
11.9 Double Check Backflow Preventer
Single Service: 6", 8"
2
FINAL
GRADE
r--.....-..
I -
@Il-----CU
M A T E R I A l S
ITE''''' OUANT. 0 E S C R I P T I 0 N
I I I 6", a" VALVE, DOUBLE CHECK
2 4 6" e" BEND -4:50 FO_ F
, . ,
3 2 6", 8" ADAPTER, C. I. (72" LONG) F-PE
3A I I 6", a" ADAPTER, C.I. e 24" LONG) F -PE (OPT.)
4 I 3 6" 8" ADAPTER, FLANGE. D.I.P.
,
~ 2 6", a" ADAPTER, FLANGE, P.V.C. (DR-IS)
6 2 6" a" VALVE, GATE, C.I., F-F
,
7 I I or Z ZIt IRON PIPE/CONCRETE FOUNDAT JON
a * PEA GRAVEL
9 * PLASTIC LINER
10 2 REACT ION BLOCK
NOTE:
Field adjust and cut Item 3 to the proper length.
* Do not interchange Items 4. 8. 5.
52
')
11.10 Double Check Backflow Preventer
Single Service: 6",8"
"';
M A T E R I A L S
ITEM I QUANT. 0 E S C R I P i I 0 N
I I I I 6" a .~ VALVE, DOUBLE CHECK
,
2 I 4 i 6" a" BEND - 900 F-F
,
3 I . 2 6", 8" ADAPTER, C.I. (48" LONG) F-PE
:U.' I I I 6" a" ADAPTER, C.I. (24" LONG) F - PE (OPT.
,
4 I ~ 6", 8" ADAPTER, FLANGE, D.I.P.
:5 I 2 6", a" ADAPTER. FLANGE. P.V.C. (DR -Ia)
6 I 2 6" a" VALVE, GATE, C.I., F'- F
,
7 I I 2" IRON PIPE /CONCRETE FOUNDATION
8 I *' PEA GRAVEL
9 I *' PLASTIC. LINER
10 I 2 REACTION BLOCK
NOTE:
Field adjust and cut Item 3 to the proper length.
* Do not interchange Items 4. 8. 5.
* This type of construction is designed for limited
working area.
53
FINAL
GRACE
-,,\
j
11.11 Double Check Backflow Preventer
Single Service: 4",6",8"
Vertical Installation
~i
TEST COCK # I
WALL.
12" PLUS 3 TIMES
PI.PE DIAMETER
SLAB
-
M A T E R I A L S
ITEM OUANT. D E S C R I P T I
0 N
I I 4" 6" a" DOUBLE CHECK VALVE ASSEMBLY
I ,
2 I 4" 6" 8" BEND-20o FLANGE - FLANGE
, ,
3 * 4" 6" a" PIPE, DUCTIL.E IRON
, ,
4 I 4" 6" 8" ADAPTER, FL.ANGE, D.I.P.
I I
NOTE:
Minimum clearance around device - 12" + 3 times
pipe diameter.
This type of construction is designed for limited
working area. (Fire Sprinkler Systems).
54
.""\
I
11.12 Reduced Pressure Backflow Preventer
Single Service: 6", 8"
TEST COCK * I
-{Iff FINAl.
GRADe:
--"'1
I
........' r----"
2 -..............-1 @
f'-.......
I
@)L----
M A T E R I A L S
ITEM QUANT. D E S C R I P T I a N
I I 6", a" VAI..VE, REDUCED PRESSURE PRINCIPI..E
2 I 4 6", s" BEND - 4~o F-F
3 2 6" s" ADAPTER, e.l. (96" LONG) F - PE
,
3A I 6" s" ADAPTER, C.!. (24" 1..0NG) F - PE (OPT.)
,
4 I 3 6", s" ADAPTER, FI..ANGE, D.I.P.
S I 2 6", 8" ADAPTER, "LANGE, P.v.c. (DR-IS)
6 2 6" s" VAI..VE. GATE. C.!. ; F-F
,
7 I or 2 2" IRON PIPE/CONCRETE F:)UNOATION
8 * PEA G~AVEL
9 * PLASTIC LINER
10 2 REACi ION BLOCK
NOTE:
Field adjust and cut Item 3 to the proper length.
* Do not interchange Items 4. 8. 5.
55
"\
I
11.13 Reduced Pressure Backflow Preventer
Single Service: 6", 8"
TEST COCK :# I
109"' .~~
" .,~~e;r~ ... ~ .
..,..
..~
e{-=~
. L.--
2 ~
M A T E- R I A .L S
ITEM I OUANT. 0 E S C R I P T I 0 N
I I I 6", a" VALVE, REDUCED PRESSURE PRINCIPLE
2 I 4 6" a" BEND-90o F-F
,
3 I 2 6", a" ADAPTER. C.I. (48" LONG) F- PE
3A I I 6", 8" ADAPTER, Col. (24" l.ONG) F -PE (OPT.)
4 I 3 6", 8" ADAPTER, FLANGE, D.I.P.
:5 2 6", a" ADAPTER, FLANGE, P.V.C. (OR-Ia)
6 2 6'" 8" VALVE, GATE, C.I., F- F
7 I 2" IRON PIPE/CONCRETE FOUNDATION
8 * PEA GRAVEL
9 I * PLASTIC 1.INER
10 .. REACTION LINER
I
NOTE:
Field adjust and cut Item 3 to the proper length.
* Do not interchange Items 4. 8. 5.
* This type of construction is designed for limited
working area.
56
FINAL
GRADE
.~
APPENDIX A
ORDINANCE 493:
BACKFLOW PREVENTION AND
CROSS-CONNECTION CONTROL PROGRAM
The l dando Sentinel
----..
PubUahed Daily
A1bunonteSprinp, Seminole Cow,ty, FIoricIa
~tllte nf )flnri?rll} SS.
COUNTY OF ORANGE
Before the undersigned authority })el'Sonally apJleared
Patty D. Johns
... ~ tho Log,] ~ -tali", of tho ad""". Sonlincl, . Daily ..........
pub...... .t AI.....n.. S"""'" ;. -'01. Coonty, Florida; that tho ._ ropy of "'_
-..t, bomg L Notice of Public Hearing ;. "" ...t"" of
OrdinanQ2 N1..UTJber 493
-.. who on oath says that
=
Was published in said neW!!paper in the issues of
July 8, 199u
-fu the
-Court,
Affiant """'" My>< that "" oUd ""- Sonli"" ~ . ....".... pU"""",, .t _..
S"""'" ;. -,. Coonty, -... """ that ""-............................ "'lin-
"""'ly ........ ;. oUd .......... Coonty, _do, ..... W... Doy and .... .... ......., M
"""""'-- """ ...tte>- .t "" .... "'"'" ;. _.. s"""'" ;. _ &nrl.... Coon'y,
"- "" · pori"" of ... ...... .... -"" "" "'" publi..... of "" .t....... ropy of ",.
-..., and .....t """'" ..,. that bel... .... ..."'" "'"' .... _ .." ........
fino ~ -... ony -. -Ie, _.. m """'" fm "" ........ of_...
--t""~".";~;Y~0 9L /)
lath
s.... .. and .."""'.... born.. me... d.y
of
July
~
2: I SWvVwJ
-A.D., 19
90
Notary Public. State of Florida at lar~A
My Commission Expires February 9, 1993
Bonde:! thru Brawn & Brown. Inc.
----.....
Notary Public
ADVERTISING CHARGE.$49 70
I NOTICE OF PUSUC HEARING
CITY OF WINTeR sPRINGS
FLORIOA '
~OT/CE IS HEREBY GIVEN by Ihe City
, S orimmISS,o!' of Ihe Cily of Winter
Jt, ::r,ci Florida,. Ihal said Commission
ii PublIC Hearing on an ordi-
nance entitlild as ~. ,
ORDINANcE NO 493
AN ORDINANCE OF THE CITY OF
WINTER SPRINGS. FLORIDA PRa-
VIDING FOR THE ADo~ AND
APPROVAL OF A SACkFLOW
PREVENTION. and CROSS-CON
NECTION CONTROL PROGRAM
TO PROTECT THE HEALTH OF
WATER CONSUMERS; PROVIDING
FOR CONTROLLING OF ACTUAl
AND/OR POTENTIAL BACkFlOW
AND CROSS-CONNECTIONS
THROUGH THE ADoPTION OF A
CROSS-CONNECTION CONTROL
MANUAL; PROVIDING FOR THE
INSPECTION AND TESTING OF
BACkFlOW PREVENTION DE-
PVICES; PROVIDING FOR FEES,
ROVIDING FOR ARTICLE IV'
PORTABLE WATER DIVISION I oF
VCEHAPTER 19. BACkFlOW PRE-
NTION AND CROSS CONNEC_
TION CONTROL PR~. PRO
VIDING PENALTIES; PROVIDING
FOR CONFLICTS, SEVERABILITY
AND AN EFFECTIVE DATE.
ThIs PUblIC Hearing Will be held al 7'30
P.m. on Ju/y 23, 1990, Or as SOon Iher-
~arberas p!>ssib/e in the CommiSSion
u,. 1m "'.:~ City Hall. 1126 EaSt S R 434
,,'n ,ar ......ings, Fl. 32708. ".
CoP'~._ of llie prOJ>oserl ordinance are
ava,_ In Ihe Office of the Ciiy Clerk
for IOSP9C1ion. InlereSIed parties may
~ar at this hearing and be heard
Pe /'9spea to thIS ~ Ordinance
rsons are advised !hat if !hey decicki
10 apPeal any deciSion made at this
meeting, !hey Will need a record Of Ihe
prOCeedIngs and for SUCh pUrPOse th
may need 10 ensure Ihal a VlIrbalim :Z
cord Of.Ihe prOCeedings is made Which
record 'ncIUdes !he lestimony and evi-
dence upOn Which !he apPeal is 10 be
. ~~~~per SeClio~ 286.0105 Florida
! Daled th is 8th day of Julv. 1990. I
CITY O~ WINTER!
SPRINGS.
FlORIDA
/S/Mary T. Norton
Mary T. Norton
City Clerk
~_Jut~
FORM NO. AD.2R.d