Definitions.
The following definitions shall apply in the interpretation and enforcement
of this Ordinance:
AIR GAP SEPARATION
Means 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.
APPROVED
Means that a backflow prevention device or method has been
accepted by the water supplier as defined by Missouri Department of
Natural Resources as suitable for the proposed use.
AUXILIARY WATER SUPPLY
Means any water source or system, other than the public water
supply, that may be available in the building or premises.
BACKFLOW
Means the flow other than the intended direction of flow,
or any foreign liquids, gases, or substances into the distribution
system of a public water supply.
BACKFLOW PREVENTION DEVICE
Means any device, method or type of construction intended
to prevent backflow into a potable water system.
CONSUMER
Means protection of the public water supply by installing
a cross connection control device or air gap separation on the main
service line to a facility.
CONSUMER'S WATER SYSTEM
Is any water system, supplied by or connected to a public
water system, from the point where it taps into the main supply line
to the user's facilities. A household plumbing system is considered
a consumer's water system.
CONTAINMENT
Means protection of the public water supply by installing
a cross connection control device or air gap separation on the main
service line to a facility.
CONTAMINATION
Means 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
Is a physical connection or arrangement between two (2) otherwise
separate piping systems; one of which contains potable water, the
other a nonpotable fluid, or water or unknown quality, where there
could be flow from one system to the other, the direction depending
on the pressure differential between the two (2). Cross connections
may be considered as direct or indirect. A direct connection is where
the potable water system is physically joined to a system containing
unsafe water, sewage, or other waste that could contaminate the safe
water system. An indirect cross connection is a condition where a
source of contaminated water may be blown across, sucked, or diverted
into the potable system.
HAZARD, DEGREE OF
Means 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 device.
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.
INDUSTRIAL PROCESS SYSTEM
Means 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.
INTERCHANGEABLE CONNECTION
Is an arrangement or device that will allow alternate but
not simultaneous use of two (2) sources of water.
ISOLATION
Means protection of a facility service line by installing
a cross connection control device or air gap separation on an individual
fixture, appurtenance, or system.
POLLUTION
Means 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
Means 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.
REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTION DEVICE
Is a device that contains a minimum of two (2) independently
acting check valves with an automatically operated pressure differential
relief valve between the two (2) check valves. During normal flow
and at the cessation of normal flow, the pressure between these two
(2) checks is less than the supply pressure. In case of leakage of
either check valve, the differential relief valve, by discharging
to the atmosphere, maintains the pressure between the check valves
at less than the supply pressure. The unit includes tightly closing
shut-off valves at each end of the device, and each device is fitted
with test cocks.
SERVICE CONNECTION
Means 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.