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 SEPARATIONA 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 inch.
APPROVED CHECK VALVEA 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 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 positive closure in all sizes where this feature is obtainable.
APPROVED DOUBLE-CHECK VALVE ASSEMBLYAn assembly of at least two 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 check valve.
APPROVED REDUCED-PRESSURE PRINCIPAL BACKFLOW PREVENTION DEVICEA device incorporating two or more check valves and an automatically operating differential relief valve located between the two checks, two shutoff valves, and equipped with necessary appurtenances for testing. The device shall operate to maintain the pressure in the zone between the two 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 valve, the differential relief valve shall operate to maintain this reduced pressure by discharging to the atmosphere. 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 SUPPLYAny water supply approved by or under the public health supervision of a public health agency of the State of New York, City of Schenectady or the Town of Niskayuna. In determining what constitutes an "approved water supply," the Department of Public Health of the State of New York (herein called the "State Health Department") shall have the final judgment as to its safety and potability.
COMMISSIONERThe Commissioner of Public Works of the Town of Niskayuna, or his authorized representative.
CONSUMERAny person to whom water is sold and furnished from the Town of Niskayuna.
CONTAMINATIONAn impairment of the quality of the Town 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.
CROSS CONNECTIONAny unprotected connection between any part of the Town 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 SUBSTANCEAny substance of a nonpoisonous nature that may create a moderate or minor hazard to the water supply system.
PERSONAny natural person, firm, association, organization, partnership, trust or association or persons, joint venture, corporation or company and includes the United States, the State of New York, the County of Schenectady, any special purpose district and any officer or agent thereof.
PREMISESIntergrated land area, including improvements thereon, undivided by public thoroughfares or water distribution mains of the Town of Niskayuna and where all parts of the premises are operated under the same management and for the same purpose.
PROTECTIVE DEVICEAny of the following devices:
(2) Approved reduced-pressure principal backflow prevention device.
(3) Approved double-check valve assembly.
SERVICE CONNECTIONThe terminal end of a service connection from the Town 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.
TOWNThe Town of Niskayuna.
TOWN WATER SUPPLYApproved water supply sold and delivered to consumers' premises through the waterworks system of the Town of Niskayuna.
TOXIC SUBSTANCEAny 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.