Definitions. As used in this section, the following
terms shall have the meanings indicated:
AIR GAP
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 flood-level rim
of the receptacle. The air gap shall be at least double the diameter
of the supply pipe or faucet, measured vertically above the floor-level
rim of the receptacle, but not less than one inch.
APPROVED
Accepted by the New York State Department of Health.
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 of water or other liquids, mixtures, or substances
into the distributing pipes of a potable supply of water from any
source or sources other than its intended source. Backsiphonage is
one type of backflow.
BACKSIPHONAGE
Backflow resulting from negative pressure in the distributing
pipes of a potable water supply.
CERTIFIED BACKFLOW PREVENTION DEVICE TESTER
A person who is examined annually by the Water District and
found competent in the testing of backflow prevention devices. Said
person shall be provided with an appropriate identification card,
renewable annually. Failure to perform duties competently and conscientiously
will result in expeditious withdrawal of certification. Said person
is one who has taken and successfully completed a backflow prevention
course approved by the New York State Health Department.
CHECK VALVE
A self-closing device which is designed to permit the flow
of fluids in one direction and to close if there is a reversal of
flow.
CROSS-CONNECTION
Any physical connection between a potable water supply and
any waste pipe, soil pipe, sewer, drain or any unapproved source or
system. Furthermore, it is any potable water supply outlet which is
submerged or can be submerged in wastewater and/or any other source
of contamination. See "backflow" and "backsiphonage."
DOUBLE-CHECK VALVE ASSEMBLY
An assembly of at least two independently acting acceptable
check valves, including tightly closing shutoff valves located at
each end of the assembly with suitable connections for testing the
watertightness of each check valve.
HAZARD, HEALTH
Any conditions, devices, or practices in the water supply
system and its operation which create or, in the judgment of the Lockport
Water District, may create a danger to the health and well-being of
the water consumer. An example of a health hazard is a structural
defect in the water supply system, whether of location, design, or
construction, that regularly or occasionally may prevent satisfactory
purification of the water supply or cause it to be polluted from extraneous
sources.
POLLUTION
The presence of any foreign substances (organic, inorganic,
radiological, or biological) in water that tends to degrade its quality
so as to constitute a hazard or impair the usefulness of the water.
REDUCED-PRESSURE-PRINCIPLE BACKFLOW PREVENTER
An assembly of two independently acting acceptable check
valves, together with an automatically operating pressure differential
relief valve between the two check valves. The assembly shall include
tightly closing shutoff valves located at each end of the assembly
and suitable connections for testing the watertightness of each valve.
SURGE TANK
The receiving, nonpressure vessel forming part of the air
gap separation between a potable and an auxiliary supply.
WATER, NONPOTABLE
Water that is not safe for human consumption or that is of
questionable potability.
WATER, POTABLE
Water free from impurities in amounts sufficient to cause
disease or harmful physiological effects. Its bacteriological and
chemical quality shall conform to the requirements of the Niagara
County Health Department and the New York State Department of Health.