Definitions. As used in this section, the following terms shall have
the meanings indicated:
AIR GAP
A physical separation sufficient to prevent backflow between
the free-flowing discharge end of the potable water system and any
other system; physically defined as a distance equal to twice the
diameter of the supply side pipe diameter but never less than one
inch.
APPROVED
Accepted by the New York State Department of Health, Dutchess
County Department of Health and City of Beacon Water and Sewer Department
meeting applicable specifications stated or cited in this regulation,
or as suitable for the proposed use.
ATMOSPHERIC VACUUM BREAKER
A device which prevents backsiphonage by creating an atmospheric
vent when there is either a negative pressure or subatmospheric pressure
in a water system.
AUXILIARY WATER SUPPLY
Any water supply on or available to the premises other than
the surveyor's approved public potable water supply.
BACK PRESSURE
A condition in which the owner's system pressure is greater
than the supplier's system pressure.
BACK-SIPHON
The flow of water or other liquids, mixtures or substances
into the distribution pipes of a potable water supply system from
any source other than its intended source, caused by a sudden reduction
of pressure in the potable water supply system.
BACKFLOW
The flow of water or other liquids, mixtures or substances
and/or positive or reduced pressure in the distribution pipes of a
potable water supply from any source other than its intended source.
BACKFLOW PREVENTION DEVICE
A device or means designed to prevent backflow or backsiphonage.
Most commonly categorized as air gap, reduced pressure principle device,
double check valve assembly, pressure vacuum breaker, atmospheric
vacuum breaker, hose bibb vacuum breaker, residential dual check,
double check with intermediate atmospheric vent, and barometric loop.
BAROMETRIC LOOP
A fabricated piping arrangement rising at least 35 feet at
its topmost point above the highest fixture it supplies. It is utilized
in water supply systems to protect against backsiphonage.
CONTAINMENT
A method of backflow prevention which requires a backflow
prevention device at the water service entrance immediately after
the water meter or, in the event of no meter, immediately after the
point of entry.
CONTAMINANT
Any physical, chemical, microbiological or radiological substance
or matter in water.
CROSS-CONNECTION
Any actual or potential connection between the public water
supply and a source of contamination or pollution.
DEPARTMENT
The City of Beacon Water and Sewer Department.
DEPARTMENT OF HEALTH
The State of New York Health Department and its agent, the
Dutchess County Department of Health.
DOUBLE CHECK VALVE ASSEMBLY (DCV)
An assembly of two independently operating spring-loaded
check valves with tightly closing shutoff valves on each side of the
check valves, plus properly located test cocks for the testing of
each check valve.
DWELLING UNIT
One or more rooms with provision for living, cooking, sanitary
and sleeping facilities arranged for the use of one family.
DWELLING, ONE-FAMILY
A building containing not more than one dwelling unit occupied
exclusively for residential purposes by one family.
DWELLING, TWO-FAMILY
A building containing not more than two dwelling units occupied
exclusively for residential purposes by two families living independently
of each other.
FIXTURE ISOLATION
A method of backflow prevention in which a backflow prevention
device is located to correct a cross-connection at an in-plant location
rather than at a water service entrance.
HOSE BIBB VACUUM BREAKER
A device which is permanently attached to a hose bibb and
which acts as an atmospheric vacuum breaker.
OWNER
Any person who has a legal title to, or license to operate
or habitat in, a property upon which a cross-connection is present.
PERSON
Any individual, partnership, company, public or private corporation,
political subdivision or agency of the State Department, agency or
instrumentality of the United States or any other legal entity.
POLLUTANT
A foreign substance that, if permitted to get into the public
water system, will degrade its quality so as to constitute a moderate
hazard or impair the usefulness or quality of the water to a degree
which does not create an actual hazard to the public health but which
does adversely and unreasonably affect such water for domestic use.
PRESSURE VACUUM BREAKER
A device containing one or two independently operated spring-loaded
check valves and an independently operated spring-loaded air inlet
valve located on the discharge side of the check or checks. Such device
includes tightly closing shutoff valves on each side of the check
valves and properly located test cocks for the testing of the check
valves.
REDUCED-PRESSURE-PRINCIPLE BACKFLOW PREVENTER (RPZ)
An assembly consisting of two independently operating approved
check valves with an automatically operating differential relief valve
located between two check valves, tightly closing shutoff valves on
each side of the check valves, plus properly located test cocks for
the testing of the check valves and the relief valve.
WATER SERVICE ENTRANCE
The point in the owner's water system beyond the sanitary
control of the City; generally considered on the outlet end of the
water meter and always before any unprotected branch.
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.