The purpose of this article is:
A. To protect the public potable water supply of the
Town of Glenville from the possibility of contamination by isolating
within its customer's internal distribution system or its customer's
private water system such contaminations or pollutants which could
backflow into the public water supply system; and
B. To comply with the requirements of the New York State
Sanitary Code 5-1.31.
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 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 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 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 PRINCIPLE BACKFLOW PREVENTION DEVICE
A 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 SUPPLY
Any 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 Glenville. 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.
COMMISSIONER
Commissioner of Public Works of the Town of Glenville, or
his authorized representative.
CONSUMER
Any person to whom water is sold and furnished from the Town
of Glenville.
CONTAMINATION
An 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-CONNECTION
Any 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 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 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.
PREMISES
Integrated land area including improvements thereon undivided
by public thoroughfares or water distribution mains of the Town of
Glenville 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:
B.
Approved reduced pressure principle backflow
prevention device.
C.
Approved double-check valve assembly.
SERVICE CONNECTION
The 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.
SHALL
Is mandatory; "may" is permissive.
TOWN WATER SUPPLY
Approved water supply sold and delivered to consumers' premises
through the waterworks system of the Town of Glenville.
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.
For the purpose of making any inspections or
discharging the duties imposed by this article, the Commissioner shall
have the right to enter upon the premises of any consumer. Each consumer,
as a condition of the continued delivery to his premises of water
from the Town water supply, shall be considered as having stated his
consent to the entry upon his premises of the Commissioner for the
purposes stated herein.
All presently installed prevention devices which do not meet the requirements of this article but were approved devices for the purposes described herein at the time of installation and which have been properly maintained, shall except for the inspection and maintenance requirements under §
259-69, be excluded from the requirements of these rules so long as the Commissioner is assured that they will satisfactorily protect the Town's water supply. Whenever the existing device is moved from the present location or requires more than minimum maintenance which constitutes a hazard to health, the unit shall be replaced by a backflow prevention device meeting the requirements of this article.