[Ord. No. 2025, 10-5-1993; Ord. No. 2596, 10-9-2022]
A. Purpose. The purpose of this Chapter is:
1.
To protect the public potable water supply from contamination
or pollution by containing within the consumer's internal distribution
system or private water system contaminants or pollutants which could
backflow through the service connection into the public potable water
supply system.
2.
To promote the elimination, containment, isolation, or control
of existing cross-connections, actual or potential, between the public
or consumer's potable water system and non-potable water system, plumbing
fixtures, and industrial-process systems.
3.
To provide for the maintenance of a continuing program of cross-connection
control which will systematically and effectively prevent the contamination
or pollution of all potable water systems.
B. Application. This Chapter shall apply to all premises served by the
public potable water system of the City of Waverly.
C. Policy.
1.
This Chapter will be reasonably interpreted by the Water Purveyor.
It is the Water Purveyor's intent to recognize the varying degrees
of hazard and to apply the principle that the degree of protection
shall be commensurate with the degree of hazard.
2.
The Water Purveyor shall be primarily responsible for protection
of the public potable water distribution system from contamination
or pollution due to backflow or contaminants or pollutants through
the water service connection. The cooperation of all consumers is
required to implement and maintain the program to control cross-connections.
The Water Purveyor and consumer are jointly responsible for preventing
contamination of the water system.
3.
If, in the judgement of the Water Purveyor or his/her authorized
representative, cross-connection protection is required through either
piping modification or installation of an approved backflow prevention
assembly, due notice shall be given to the consumer. The consumer
shall immediately comply by providing the required protection at his/her
own expense; and failure, refusal, or inability on the part of the
consumer to provide such protection shall constitute grounds for discontinuing
water service to the premises until such protection has been provided.
[Ord. No. 2025, 10-5-1993; Ord. No. 2596, 10-9-2022]
The definitions listed in this Section shall apply in the interpretation
and enforcement of this Chapter.
AIR GAP SEPARATION
The unobstructed vertical distance through the free atmosphere
between the lowest opening from any pipe or faucet supplying water
to a tank, plumbing fixture, or other device and the overflow level
rim of the receptacle, and shall be at least double the diameter of
the supply pipe measured vertically above the flood level rim of the
vessel, but in no case less than one (1) inch.
AUXILIARY WATER SUPPLY
Any water source or system, other than the public water supply,
that may be available in the building or premises.
BACKFLOW
The flow, other than the intended direction of flow, of any
foreign liquids, gases, or substances into the distribution system
of a public water supply.
BACKFLOW PREVENTION ASSEMBLY
Any double check valve or reduced pressure principle backflow
preventer having resilient-seated shut-off valves on both the upstream
and downstream end and the necessary test cocks as integral parts
of the assembly.
CONSUMER
The owner or person in control of any premises supplied by
or in any manner connected to a public water system.
CONTAINMENT
Protection of the public water supply by installing a backflow
prevention assembly or air gap separation on the main service line
to a facility.
CONTAMINATION
An impairment of the quality of the water by sewage, process
fluids, or other wastes to a degree which could create an actual hazard
to the public health through poisoning or through spread of disease
by exposure.
CROSS-CONNECTION
Any physical link between a potable water supply and any
other substance, fluid, or source, which makes possible contamination
of the potable water supply due to the reversal of flow of the water
in the piping or distribution system.
HAZARD, DEGREE OF
An evaluation of the potential risk to public health and
the adverse effect of the hazard upon the potable water system.
1.
HAZARD, HEALTHAny condition, device, or practice in the water supply system and its operation which could create or may create a danger to the health and well-being of the water consumer.
2.
HAZARD, PLUMBINGA 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 backflow prevention assembly.
3.
HAZARD, POLLUTIONALAn actual or potential threat to the physical properties of the water system or to the potability of the public or the consumer's potable water system but which would constitute a nuisance or be aesthetically objectionable or could cause damage to the system or its appurtenances, but would not be dangerous to health.
4.
HAZARD, SYSTEMAn actual or potential threat of severe damage to the physical properties of the public potable water system or the consumer's 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.
ISOLATION
Protection of a facility's internal plumbing system by installing
a backflow prevention assembly, air gap separation, or other backflow
prevention device on an individual fixture, appurtenance, or system.
POLLUTION
The presence of any foreign substance (organic, inorganic,
or biological) in water which tends to degrade its quality so as to
constitute a hazard or impair the usefulness of the water to a degree
which does not create an actual hazard to the public health but which
does adversely and unreasonably affect such waters for domestic use.
PUBLIC POTABLE WATER SYSTEM
Any publicly or privately owned water system supplying water
to the general public which is satisfactory for drinking, culinary,
and domestic purposes and meets the requirements of the Missouri Department
of Natural Resources.
SERVICE CONNECTION
The terminal end of a service line from the public water
system. If a meter is installed at the end of the service, then the
service connection means the downstream end of the meter.
WATER PURVEYOR
The owner, operator, or individual in responsible charge
of a public water system.
[Ord. No. 2025, 10-5-1993; Ord. No. 2596, 10-9-2022]
A. No water service connection shall be installed or maintained to any
premises where actual or potential cross-connections to the public
potable or consumer's water system may exist unless such actual or
potential cross-connections are abated or controlled to the satisfaction
of the Water Purveyor, and as required by the laws and regulations
of the Missouri Department of Natural Resources (10 CSR 60-Chapter
11, Backflow Prevention).
B. No connection shall be installed or maintained whereby an auxiliary
water supply may enter a public potable or consumer's water system
unless such auxiliary water supply and the method of connection and
use of such supply shall have been approved by the Water Purveyor
and the Missouri Department of Natural Resources.
C. No water service connection shall be installed or maintained to any
premises in which the plumbing system, facilities, and fixtures have
not been constructed and installed using acceptable plumbing practices
considered by the Water Purveyor as necessary for the protection of
health and safety.
[Ord. No. 2025, 10-5-1993; Ord. No. 2596, 10-9-2022]
A. The consumer's premises shall be open at all reasonable times to
the Water Purveyor, or his/her authorized representative, for the
conduction of surveys and investigations of water use practices within
the consumer's premises to determine whether there are actual or potential
cross-connections to the consumer's water system through which contaminants
or pollutants could backflow into the public potable water system.
B. On request by the Water Purveyor or his/her authorized representative,
the consumer shall furnish information on water use practices within
his/her premises.
C. It shall be the responsibility of the water consumer to conduct periodic
surveys of water use practices on his/her premises to determine whether
there are actual or potential cross-connections to his/her water system
through which contaminants or pollutants could backflow into his/her
or the public potable water system.
[Ord. No. 2025, 10-5-1993; Ord. No. 2596, 10-9-2022]
A. The type of protection required by this Chapter shall depend on the
degree of hazard which exists, as follows:
1.
An approved air gap separation shall be installed where the
public potable water system may be contaminated with substances that
could cause a severe health hazard.
2.
An approved air gap separation or an approved reduced pressure
principle backflow prevention assembly shall be installed where the
public potable water system may be contaminated with a substance that
could cause a system or health hazard.
3.
An approved air gap separation or an approved reduced pressure
principle backflow prevention assembly or an approved double check
valve assembly shall be installed where the public potable water system
may be polluted with substances that could cause a pollutional hazard
not dangerous to health.
[Ord. No. 2025, 10-5-1993; Ord. No. 2596, 10-9-2022]
A. An approved backflow prevention assembly shall be installed on each
service line to a consumer's water system serving premises where,
in the judgement of the Water Purveyor or the Missouri Department
of Natural Resources, actual or potential hazards to the public potable
water system exist. The type and degree of protection required shall
be commensurate with the degree of hazard.
B. An approved air gap separation or reduced pressure principle backflow
prevention assembly shall be installed at the service connection or
within any premises where, in the judgement of the Water Purveyor
or the Missouri Department of Natural Resources, the nature and extent
of activities on the premises, or the materials used in connection
with the activities, or material stored on the premises, would present
an immediate and dangerous hazard to health should a cross-connection
occur, even though such cross-connection may not exist at the time
the back:flow prevention assembly is required to be installed. This
includes but is not limit to the following situations:
1.
Premises having an auxiliary water supply, unless the quality
of the auxiliary supply is acceptable to the Water Purveyor and the
Missouri Department of Natural Resources.
2.
Premises having internal cross-connections that are not correctable,
or intricate plumbing arrangements which make it impractical to ascertain
whether or not cross-connections exist.
3.
Premises where entry is restricted so that inspection for cross-connections
cannot be made with sufficient frequency or at sufficiently short
notice to assure the cross-connections do not exist.
4.
Premises having a repeated history of cross-connections being
established or reestablished.
5.
Premises, which due to the nature of the enterprise therein,
are subject to recurring modification or expansion.
6.
Premises on which any substance is handled under pressure so
as to permit entry into the public water supply, or where a cross-connection
could reasonably be expected to occur. This shall include the handling
of process waters and cooling waters.
7.
Premises where materials of a toxic or hazardous nature are
handled such that if backsiphonage or backpressure should occur, a
serious health hazard may result.
C. The types of facilities listed in Appendix A to this Chapter fall into one (1) or more of the categories
of premises where an approved air gap separation or reduced pressure
principle backflow prevention assembly is required by the Water Purveyor
and the Missouri Department of Natural Resources to protect the public
water supply and must be installed at these facilities unless all
hazardous or potentially hazardous conditions have been eliminated
or corrected by other methods to the satisfaction of the Water Purveyor
and the Missouri Department of Natural Resources.
D. The
type of facility listed in Appendix B are premises where an approved double check valve assembly
is required by the Water Purveyor and the Missouri Department of Natural
Resources as the minimum level of protection for the public water
supply and must be installed at these facilities unless all hazardous
or potentially hazardous conditions have been eliminated or corrected
by other methods to the satisfaction of the Water Purveyor and the
Missouri Department of Natural Resources.
E. Customer
facilities not listed in Appendix A or Appendix B may be designated a backflow hazard by written notification
from the Water Purveyor. The notice shall specify the nature of the
customer activity that necessitates designation of the facility as
a backflow hazard, the type of backflow protection required and the
date by which the customer shall install or construct the required
assembly.
[Ord. No. 2025, 10-5-1993; Ord. No. 2596, 10-9-2022]
A. Any backflow prevention assembly required to protect the facilities
listed in Appendix A and Appendix B shall be of a model or construction approved by the Water
Purveyor and the Missouri Department of Natural Resources.
1.
Air gap separation to be approved shall be at least twice the
diameter of the supply pipe, measured vertically above the top rim
of the receiving vessel, but in no case less than one (1) inch.
2.
A double check valve assembly for Class II hazards or a reduced
pressure principle backflow prevention assembly for Class I hazards
shall be approved by the Water Purveyor, and shall appear on the current
list of approved backflow prevention assemblies maintained by the
Missouri Department of Natural Resources (Double Check Valve Assemblies
and Reduces Pressure Backflow Prevention Assemblies approved by the
University of Southern California's Foundation for Cross-Connection
Control and Hydraulic Research).
[Ord. No. 2025, 10-5-1993; Ord. No. 2596, 10-9-2022]
A. Backflow prevention assemblies required by this Chapter shall be
installed at a location and in a manner approved by the Water Purveyor
and shall be installed at the expense of the water consumer.
B. Backflow prevention assemblies shall be installed and in an orientation
as specified by the manufacturer. The Department of Natural Resources
maintains a list of approved backflow prevention assemblies and the
orientation allowed for each assembly.
C. Modification
to an assembly using spare parts other than those of the original
manufacturer invalidates the approval of the device.
D. No
bypass piping shall be allowed around a backflow prevention assembly
unless the bypass is equipped with the same degree of backflow prevention
protection and is tested annually.
E. Backflow
prevention assemblies installed on the service line to a customer's
water system shall be located so as to be readily accessible for maintenance
and testing and protected from freezing. No reduced pressure principle
backflow prevention assembly shall be located where it will be submerged
or subject to flooding by any fluid.
F. No plug or additional piping shall be affixed to the pressure differential
relief port valve (except for specifically-designed funnel apparatus
available from the manufacturer). The pressure differential relief
port must be a minimum of twelve (12) inches above the floor level.
[Ord. No. 2025, 10-5-1993; Ord. No. 2596, 10-9-2022]
A. It shall be the duty of the consumer at any premises on which backflow
prevention assemblies required by this Chapter are installed to have
inspections, tests, and overhauls made in accordance with the following
schedule or more often where test results indicate a need. The Water
Purveyor may establish the annual test date based on the nature of
the customer's water use requirements.
1.
Air gap separations shall be inspected at the time of installation
and at least every twelve (12) months thereafter.
2.
Double check valve assemblies shall be inspected and tested
for proper operation at the time of installation and at least every
twelve (12) months thereafter.
3.
Reduced pressure principle backflow prevention assemblies shall
be inspected and tested for proper operation at the time of installation
and at least every twelve (12) months thereafter.
B. Inspections, tests, and overhauls of backflow prevention assemblies
shall be made at the expense of the water consumer and shall be performed
by a State of Missouri certified backflow prevention assembly tester.
C. Whenever backflow prevention assemblies required by this Chapter
are found to be defective, they shall be repaired or replaced at the
expense of the consumer without delay.
D. Modification to an assembly using spare parts other than those of
the original manufacturer invalidates the approval of the device.
E. The
water consumer must maintain a complete record of each backflow prevention
assembly from purchase to retirement. This shall include a comprehensive
listing that includes a record of all tests, inspections, and repairs.
Records of inspection, tests, repairs, and overhauls shall be made
available to the Water Purveyor upon request.
F. Backflow prevention assemblies shall not be bypassed, made inoperative,
removed, or otherwise made ineffective.
[Ord. No. 2025, 10-5-1993; Ord. No. 2596, 10-9-2022]
A. The Water Purveyor shall deny or discontinue, after reasonable notice
to the occupants thereof, the water service to any premises wherein
any backflow prevention assembly required by this Chapter is not installed,
tested, and maintained in a manner acceptable to the Water Purveyor,
or if it is found that the backflow prevention assembly has been removed
or bypassed, or if an unprotected cross-connection exists on the premises.
B. Water service to such premises shall not be restored until the consumer
has corrected or eliminated such conditions or defects in conformance
with this Chapter to the satisfaction of the Water Purveyor.