As used in this article, the following terms
shall have the meanings indicated:
ACCEPTABLE BACKFLOW PREVENTION DEVICE
An acceptable air gap, reduced pressure zone device or double-check
valve assembly as used to contain potential contamination within a
facility. In order for the reduced pressure zone device or the double-check
valve assembly to be acceptable it must be listed on the most current
version of the New York State Department of Health List of Acceptable
Devices.
AESTHETICALLY OBJECTIONABLE FACILITY
One in which substances are present which if introduced into
the public water supply system could be a nuisance to other water
customers, but would not adversely affect human health. Typical examples
of such substances are: food-grade dyes, hot water, stagnant water
from fire lines in which no chemical additives are used, etc.
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 said vessel. An approved air gap shall be at least double the diameter
of the supply pipe, measured vertically, above the top of the rim
of the vessel; and in no case less than one inch.
APPROVED
Accepted by the Superintendent of Public Works as meeting
an applicable specification stated or cited in this article, or as
suitable for the proposed use.
AUXILIARY WATER SUPPLY
Any water supply on or available to the premises other than
the Village of Middleport approved public water supply. These auxiliary
waters may include water from another purveyor's public potable water
supply or any natural source(s), such as a well, spring, river, stream,
harbor, etc., or used waters. These waters may be contaminated or
they may be objectionable and constitute an unacceptable water source
over which the water purveyor does not have sanitary control.
BACKFLOW
A flow condition induced by a differential in pressure that
causes the flow of water or other liquids and/or gases into the distribution
pipes of the Village of Middleport supply system from any source other
than its intended source.
CERTIFIED TESTER
That individual or firm approved to accomplish the necessary
inspections and operational tests of backflow prevention devices.
CONTAMINATION
The presence in water of a substance that tends to degrade
its quality.
CUSTOMER
A water user served by the Village of Middleport supply system.
CUSTOMER'S WATER SYSTEM
The piping used to convey water supplied by the Village of
Middleport supply system throughout a customer's facility. The system
shall include all those parts of the piping beyond the control point
of the Village of Middleport water supply system. The control point
is either the curb valve or the main valve located in the public right-of-way
that isolates the customer's facilities from the district distribution
system.
DEGREE OF HAZARD
Whether a facility is rated as hazardous, aesthetically objectionable
or nonhazardous.
DOUBLE-CHECK VALVE ASSEMBLY, ACCEPTABLE
An assembly composed of two single, independently acting
check valves, including tightly closing shutoff valves located at
each end of the assembly and suitable connections for testing the
watertightness of each check valve.
HAZARDOUS FACILITY
One in which substances may be present which if introduced
into the public water system would or may endanger or have an adverse
effect on the health of other water customers. Typical examples: laboratories,
sewage treatment plant, chemical plants, hospitals and mortuaries.
NONHAZARDOUS FACILITY
One which does not require the installation of an acceptable
backflow prevention device.
PUBLIC WATER SUPPLY SYSTEM
The Village of Middleport system including the source, treatment
works, transmission mains, distribution system and storage facilities
serving the public. This includes the distribution system up to its
connection with the customer's water system.
REDUCED PRESSURE ZONE DEVICE, ACCEPTABLE
A device containing a minimum of two independently acting
check valves, together with an automatically operated pressure differential
relief valve located between the two check valves. During normal flow
and at the cessation of normal flow the pressure between these two
checks shall be less than the upstream (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.
The unit must include tightly closing shutoff valves located at each
end of the device, and each device shall be fitted with properly located
test cocks.
SUPERINTENDENT
The Superintendent of Public Works of the Village of Middleport.