For the purpose of this article, unless it is plainly
evident from the context that a different meaning is intended, certain
terms used herein are defined as follows:
AIR-GAP SEPARATION
A physical break between a supply pipe and a receiving vessel.
The air gap shall be at least double the diameter of the supply pipe,
measured vertically above the top rim of the vessel, and in no case
less than one (1) inch.
APPROVED CHECK VALVE
A check valve that seats readily and completely. It must
be carefully machined to have free-moving parts and assured watertightness.
The face of the closure element and valve seat must be bronze, composition
or other noncorrodible material which will seat tightly under all
prevailing conditions of field use. Pins and bushings shall be of
bronze or other noncorrodible, nonsticking material, machined for
easy, dependable operation. The closure element (e.g., clapper) shall
be internally weighted or otherwise internally equipped to promote
rapid and positive closure in all sizes where this feature is obtainable.
APPROVED DOUBLE CHECK-VALVE ASSEMBLY
An assembly of at least two (2) independently acting approved
check valves, including tightly closing shutoff valves on each side
of the check-valve assembly and suitable test cocks plus connections
available for testing the watertightness of each valve.
APPROVED REDUCED-PRESSURE-PRINCIPLE BACKFLOW PREVENTION DEVICE
(RPZ)
A device incorporating two (2) or more check valves and an
automatically operated differential relief valve located between the
two (2) checks, two (2) shutoff valves and equipped with necessary
appurtenances for testing. The device shall operate to maintain the
pressure in the zone between the two (2) check valves, less than the
pressure on the public water supply side of the device. At cessation
of normal flow, the pressure between the check valves shall be less
than the supply pressure. In case of leakage of either check valve,
the differential relief valve shall operate to maintain this reduced
pressure by discharging to the atmosphere. When the inlet pressure
is two (2) pounds per square inch or less, the relief valve shall
open to the atmosphere, thereby providing an air gap in the device.
To be approved, these devices must be readily accessible for maintenance
and testing and installed in a location where no part of the device
will be submerged.
APPROVED WATER SUPPLY
Any water supply approved by, or under the public health
supervision of, a public health agency of the State of New York, the
County of Albany or the City of Albany. In determining what constitutes
an "approved water supply," the Department of Public Health of the
State of New York (herein called "State Health Department") shall
have the final judgment as to its safety and potability.
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 a public water supply from any source other than its intended
source.
CITY WATER SUPPLY
An approved water supply sold and delivered to consumers'
premises through the waterworks system of the City of Albany.
COMMISSIONER
The Commissioner of Water of the City of Albany, or his authorized
representatives.
CONSUMER
Any person to whom water is sold and furnished from the City
of Albany.
CONTAMINATION
An impairment of the quality of the City water supply by
the presence of any foreign substance (organic, inorganic, radiological
or biological) to a degree which creates a hazard to the public health.
COUNTY HEALTH OFFICER
The Albany County Health Officer, his assistants or authorized
deputies acting as, or any other person appointed as, Health Officer
of the County of Albany.
CROSS-CONNECTION
Any unprotected connection between any part of the City waterworks
system used or intended to supply water for drinking purposes and
any source or system containing water or substance that is not or
cannot be approved as safe, wholesome and potable for human consumption.
NONTOXIC SUBSTANCE
Any substance of a nonpoisonous nature that may create a
moderate or minor hazard to the water supply system.
PERSON
Any natural person, firm, association, organization, partnership,
trust or association of persons, joint venture, corporation or company,
and includes the United States, the State of New York, the County
of Albany, any special purpose district and any officer or agent thereof.
PREMISES
Integrated land area, including improvements thereon, undivided
by public thoroughfares or water distribution mains of the City of
Albany and where all parts of the premises are operated under the
same management and for the same purpose.
PROTECTIVE DEVICE
Any of the following devices:
(2)
Approved reduced-pressure-principle backflow
prevention device.
(3)
Approved double check-valve assembly.
(4)
Approved single check-valve assembly.
SERVICE CONNECTION
The terminal end of a service connection from the City water
supply at its point of delivery to the consumer. If a meter is installed,
"service connection" means the downstream end of the meter. No unprotected
takeoffs from the service line ahead of any meter or backflow protective
device located at the point of delivery to the consumer shall be permitted.
TOXIC SUBSTANCE
Any substance (liquid, solid or gaseous), including raw sewage
and lethal substances, that when introduced into the water supply
system creates or may create a danger to the health and well-being
of the consumer.