[R.O. 1996 § 700.130; Ord. No. 1105 § 1(700.150), 5-27-1997]
A.
The purpose of this Article is to:
1.
Protect the public potable water
supply from contamination or pollution by containing within the consumer's
internal distribution system(s) or private water system(s) such contaminants
or pollutants which could backflow through the service connection
into the public potable water supply system.
2.
Promote the elimination, containment,
isolation, or control of existing cross-connections, actual or potential,
between the public or consumer's potable water systems and non-potable
water systems, plumbing fixtures and industrial-process systems.
3.
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.
[R.O. 1996 § 700.140; Ord. No. 1105 § 1(700.160), 5-27-1997]
The following words, terms, and phrases,
when used in this Article, shall have the meanings ascribed to them
in this Section, except where the context clearly indicates a different
meaning:
The unobstructed vertical distance through the free atmosphere
between the lowest opening from the pipe or faucet conveying water
or waste to a tank, plumbing fixture, receptor or other assembly and
the flood level rim of the receptacle. These vertically, physically
separations must be at least twice the diameter of the water supply
outlet, but never less than one (1) inch (25 mm).
Any water source or system, other than the City's approved
public water supply, that may be available in the building or premises.
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.
An assembly or means assigned to prevent backflow and shall
be of a model or construction approved by the City and the Missouri
Department of Natural Resources.
The City of Grain Valley, Missouri.
The owner or person in control of any premises supplied by
or in any manner connected to a public water system.
Protection of the public water supply by installing a backflow
prevention assembly on the main service line to a facility.
An impairment of the quality of the water by any foreign
substance that degrades the quality of the potable water supply or
creates a health hazard.
Any physical links, 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.
An assembly consisting of two (2) internally spring loaded
check valves, installed as a unit between two (2) tightly closing
resilient-seated shutoff valves and fittings with properly located
resilient-seated test cocks.
A double-check valve assembly with a water meter and double-check
in the by-pass line.
An evaluation of the potential risk to public health and
the adverse effect of the hazard upon the potable water system.
Hazard, Health: Any 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.
Hazard, Plumbing: 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
backflow prevention assembly.
Hazard, Pollutional: An 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.
Hazard, System: An 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.
Any system containing a 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, pollutional or plumbing
hazard if introduced into a potable water supply.
Protection of a facilities internal plumbing system by installing
a backflow prevention assembly, air-gap separation or other backflow
prevention device on an individual fixture, appurtenance, or system.
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.
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.
An assembly consisting of two (2) independently acting approved
check valves together with a hydraulically operating, mechanically
independent pressure differential relief valve located between the
check valves and below the first check valve. These units are located
between two (2) tightly closing resilient-seated shutoff valves as
an assembly and equipped with properly located resilient-seated test
cocks.
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.
[R.O. 1996 § 700.150; Ord. No. 1105 § 1(700.200), 5-27-1997]
A.
This Article shall apply to all premises
served by the public potable water system of the City of Grain Valley
and will be reasonably interpreted by the City. It is the City's intent
to recognize the varying degrees of hazard and to apply the principle
that the degree of protection required shall be commensurate with
the degree of hazard.
B.
If, in the judgment of the City, cross-connection
protection is required through either piping modification installation
of an approved backflow prevention device, due notice shall be given
to the consumer. The consumer shall immediately comply by providing
the required protection at his/her own expense; failure refusal, or
inability on the part of the consumer to provide such protection shall
constitute grounds for discontinuing water service to the premises,
as provided in this Article, until such protection has been provided.
C.
No water service connection to any premises
shall be installed or maintained unless the water supply is protected
as required by this Article. Water service to any premises shall be
discontinued by the City if a backflow prevention assembly required
by this Article is not installed, tested, and maintained, or if it
is found that a backflow prevention assembly has been removed, bypassed,
or if an unprotected cross-connection exists on the premises. Service
will not be restored until such conditions or defects are corrected.
[R.O. 1996 § 700.160; Ord. No. 1105 § 1(700.201), 5-27-1997]
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 City.
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
City.
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 determined by the City to be necessary for the
protection of health and safety.
[R.O. 1996 § 700.170; Ord. No. 1105 § 1(700.202), 5-27-1997]
A.
The consumer's premises shall be open at
all reasonable times for the City to conduct surveys and investigations
of water use practices within the consumer's premises to determine
whether there are actual or potential cross-connections to consumer's
water system through which contaminants or pollutants could backflow
into the public potable water system.
B.
On request by the City, the consumer shall
furnish information on water use practices within his/her premises.
C.
It shall be the responsibility of the 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, to notify
the City if such connections are found to exist, and to make any repairs
necessary to bring his/her water system into compliance with the provisions
of this Article.
[R.O. 1996 § 700.180; Ord. No. 1105 § 1(700.203), 5-27-1997]
A.
The type of protection required by this
Article 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.
[R.O. 1996 § 700.190; Ord. No. 1105 § 1(700.204), 5-27-1997]
A.
An approved backflow prevention device
shall be installed on each service line to a consumer's water system
serving premises, where in the judgment of the City, 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,
as determined by the City.
B.
An approved air-gap separation or reduced
pressure principle backflow prevention device shall be installed at
the service connection or within any premises where, in the judgment
of the City, the nature and extent of activities 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 backflow prevention device is required to be
installed. This includes, but is not limited to, the following situations:
1.
Premises having an auxiliary water
supply, unless the quality of the auxiliary supply is acceptable to
the City.
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 inspections 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 re-established.
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 back-siphonage or back-pressure
should occur, a serious health hazard may result.
C.
Facilities representing Class I backflow
hazards fall into one (1) or more of the categories of premises where
an approved air-gap separation or reduced pressure principle backflow
preventing assembly is required by the City 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 City. This
includes, but is not limited to the following types of facilities:
1.
Aircraft and missile manufacturing
plants.
2.
Automotive plants, including those
which manufacture motorcycles, automobiles, trucks, recreational vehicles
and construction and agricultural equipment.
3.
Potable water dispensing stations
which are served by a public water system.
4.
Beverage bottling plants, including
dairies and breweries.
5.
Canneries, packing houses and reduction
plants.
6.
Car washes.
7.
Chemical, biological and radiological
laboratories, including those in high school, trade schools, colleges,
universities and research institutions.
8.
Hospitals, clinics, medical buildings,
autopsy facilities, morgues, mortuaries, and other medical facilities.
9.
Metal or plastic manufacturing, fabricating,
cleaning, plating or processing facilities.
10.
Plants manufacturing paper and paper
products.
11.
Plants manufacturing, refining, compounding
or processing fertilizer, firm, herbicides, natural or synthetic rubber,
pesticides, petroleum or petroleum products, pharmaceuticals, radiological
materials or any chemical which would be a contamination to the public
water system.
12.
Commercial facilities that use herbicides,
pesticides, fertilizers or any chemical which would be a contaminant
to the public water system.
13.
Plant processing, blending or refining
animal, vegetable or mineral oils.
14.
Commercial laundries and dye works.
15.
Sewage, stormwater industrial waste
treatment plants and pumping stations.
16.
Water facilities, including piers,
docks, marinas and shipyards.
17.
Industrial facilities which recycle
water.
18.
Restricted or classified facilities
or other facilities closed to the supplier of water or the department.
19.
Fire sprinkler system using any chemical
additives.
20.
Auxiliary water systems.
21.
Irrigation systems (including in-ground
lawn sprinkle systems) with facilities for injection of pesticides,
herbicides or other chemicals or with provisions for creating back-pressure.
22.
Portable tanks for transporting water
taken from a public water system.
23.
Facilities which have pumped or repressurized
cooling or heating systems that are served by a public water system,
including all boiler systems.
D.
Facilities representing Class II backflow
hazards fall into the category of premises where an approved air-gap
separation, reduced pressure principle backflow prevention assembly,
double-check valve assembly is required by the City 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 City. This
includes, but is not limited to, the following types of facilities:
1.
Tanks to store water from the public
water system for firefighting only, unless such tanks meet the requirements
of the Missouri Department of Natural Resources for construction to
maintain bacteriological quality of the water.
2.
Irrigation systems (including in-ground
lawn sprinkler systems) not using chemical additives and with no provisions
for creating back pressure.
3.
Fire sprinkler systems not using
chemical additives (double detector check valve assembly required).
4.
Fire lines (double detector check
valve assembly required).
5.
Swimming pools with a piped or permanent
connection to the water supply.
6.
Cross-connections that could permit
introduction of contaminants into the public or customer water system
and thereby create a nuisance, be aesthetically objectionable or cause
minor damage to the public water system or its appurtenances.
[R.O. 1996 § 700.200; Ord. No. 1105 § 1(700.205), 5-27-1997]
The owner of any premises with existing
water service shall protect the public water system against backflow
by installing an approved device commensurate with the degree of hazard
in the service line in accordance with this Article.
[R.O. 1996 § 700.210; Ord. No. 1105 § 1(700.206), 5-27-1997]
All new water connections shall protect
the public water system against backflow by installing an approved
device commensurate with the degree of hazard in the service line
in accordance with this Article. Major modifications or major additions
to water systems shall be considered to be new service lines or systems
for purposes of this Section.
[R.O. 1996 § 700.220; Ord. No. 1105 § 1(700.207), 5-27-1997]
Existing backflow prevention assemblies
approved by the City at the time of installation and properly maintained
shall, except for inspection and maintenance requirements, be excluded
from the requirements of this Article so long as the City is assured
and concludes that these assemblies will satisfactorily protect the
water system. Whenever the existing assembly is moved from its present
location, or requires more than minimum maintenance, or when the City
finds that the maintenance constitutes a hazard to health, the unit
shall be replaced by a backflow prevention assembly meeting the requirements
of this Article.
[R.O. 1996 § 700.230; Ord. No. 1105 § 1(700.208), 5-27-1997]
A.
The discharge pipe of an air-gap shall
terminate a minimum of two (2) pipe diameters of the discharge pipe
above the flood level rim of the receiving vessel; in no case shall
the distance be less than one (1) inch (or 25 mm).
B.
Backflow prevention assemblies required
by this Article shall be installed at a location and in a manner approved
by the City and shall be installed at the expense of the water consumer.
C.
Only those models of double-check valve
assemblies which are on the approved list maintained by the Missouri
Department of Natural Resources are acceptable to meet the requirements
of this Article.
D.
A reduced-pressure principle assembly shall
not be installed upstream of a fire pump.
E.
Reduced pressure principle backflow prevention
assemblies shall be installed with no plug or additional piping affixed
to the pressure differential relief valve port (except for specifically
designed funnel apparatus available from the manufacturer) and with
the pressure differential relief valve port a minimum of twelve (12)
inches above floor level. Additionally, the assembly shall be installed
at a location where any leakage from the pressure differential relief
valve port will be noticed, that allows easy access to the assembly
for maintenance and testing, and that will not subject the assembly
to flooding, excessive heat or freezing.
F.
Backflow prevention assemblies installed
on the service line to the consumer's water system shall be located
on the consumer's side of the water meter, immediately inside the
wall where the line enters the building and prior to any other connection
or as approved by the City.
G.
Backflow prevention assemblies shall be
located so as to be readily accessible for maintenance and testing
and shall be protected from excessive heat and freezing. No reduced
pressure principle backflow prevention assembly shall be located where
it will be submerged or subject to flooding by any fluid.
H.
No bypass piping shall be allowed around
a backflow prevention assembly unless the bypass is equipped with
the same level of protection.
[R.O. 1996 § 700.240; Ord. No. 1105 § 1(700.209), 5-27-1997]
It shall be the duty of the consumer
at any premises where backflow prevention assemblies are installed
to have certified inspections and operational tests made at least
once per year, as well as at the time of construction or installation.
In those instances where the City deems the hazard to be great enough,
certified inspections may be required at more frequent intervals.
These inspections and tests shall be at the expense of the water consumer
and shall be performed by a tester certified by the Missouri Department
of Natural Resources to perform such tests. These assemblies shall
be repaired, overhauled, or replaced at the expense of the consumer
whenever said assemblies are found to be defective. Records of such
tests, repairs and overhaul shall be mailed to the City and kept for
a period of five (5) years. The report must be on an approved form
and must contain the name, signature and certificate number of the
certified backflow prevention assembly tester attesting to the compliance
of the assembly with established operational requirements. Routine
reports shall be submitted within seven (7) days after making the
inspection or test.
[R.O. 1996 § 700.250; Ord. No. 1105 § 1(700.210), 5-27-1997]
A.
The City 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
Article is not installed, tested, and maintained in a manner acceptable
to the City, 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.
Reasonable notice shall be provided in
writing by the City by personal contact or service, certified mail,
posting said notice on the consumer's property, or by any other reasonable
method available to the City. The type of notice and the amount of
time provided for the consumer to bring his/her water system into
compliance with the provisions of this Article will be commensurate
with the degree of hazard imposed on the public water supply and shall
be at the sole discretion of the City.
C.
Water service to such premises shall not
be restored until the consumer has corrected or eliminated such conditions
or defects in conformance with this Article to the satisfaction of
the City.
[R.O. 1996 § 700.260; Ord. No. 1105 § 1(700.211), 5-27-1997]
The City's Community Development
Director or his/her designee shall be the City's official representative
responsible for carrying out and enforcing the duties and obligations
of the City as specified in this Article. Final decisions rendered
by the City's representative pursuant to this Article may be reviewed
by the City's Public Works Committee and/or the Board of Aldermen,
upon request by the consumer.
[R.O. 1996 § 700.270; Ord. No. 1105 § 1(700.212), 5-27-1997; Ord. No. 2054, 11-23-2009]
This Article is intended to be consistent with the provisions of the International Plumbing Code, as amended and adopted by the City and included in Chapter 500, Buildings and Building Regulations, of the Code of the City of Grain Valley. In the event that any conflict is determined to exist between the provisions of this Article and International Plumbing Code as amended and adopted by the City, the more stringent provision providing the most protection for backflow prevention shall apply.
