[Ord. 603, 2/10/1987, § 201; as amended by Ord.
748, 6/11/2001; and by Ord. 810, 12/17/2007]
For the purpose of this Part, the following words shall have
the meaning indicated unless clearly indicated otherwise in the text:
The unobstructed vertical distance through the free atmosphere
between the lowest opening from any pipe or faucet supplying potable
water to a tank, plumbing fixture or other device and the flood level
rim of the receptacle. The differential distance shall be at least
double the diameter (2 x D) of the supply pipe, measured vertically,
above the top of the rim of the vessel. In no case shall the air gap
be less than one inch.
That a backflow prevention device or method has been accepted
by the Borough as suitable for the proposed use.
A device containing a shutoff valve followed by a valve body
containing a float-check, a check seat and an air inlet port. When
the shutoff valve is open, the flow of water causes the float to close
the air inlet port. When the shutoff valve is closed, the float falls
and forms a check valve against backsiphonage and at the same time
opens the air inlet port.
Any water source or system on the premises of or available
to the consumer except connections to other approved community water
supply systems.
A flow condition, induced by a differential in pressure,
that causes the flow of water or mixtures of water and other liquids,
gases or other substances into the distribution pipes of a potable
water supply system from a source other than its intended source.
A device or other means which will prevent the backflow of
water or liquids of questionable quality into the public water system.
The backflow of water or mixtures of water and other liquids,
gases or other substances from a plumbing fixture or other customer
source into the Borough's public water system main due to a temporary
negative or subatmospheric pressure within the public water system.
The Borough of Oxford, Chester County, Pennsylvania.
The person or entity owning, occupying or controlling any
premises supplied by or in any manner connected to the public water
system.
Any water system located on the consumer's premises,
supplied by or in any manner connected to the public water system.
A single residential (apartment, condominium, etc.) or residential
unit plumbing system is considered to be a "consumer water system."
Cross-connection control which isolates the customer's
entire facility from the public water supply system so as to provide
the protection necessary to prevent contamination of the public water
supply in the event of backflow from the customer's facility.
The degradation of the quality of the drinking water by wastewaters,
process fluids or any water of a quality less than accepted drinking
water quality to a degree which would create an actual hazard to the
public health through poisoning or through the spread of disease.
An arrangement allowing either a direct or indirect connection
through which backflow, including backsiphonage, can occur between
the drinking water in the public water system and a system containing
a source or potential source of contamination.
An evaluation of the potential risk to health and the adverse
effect upon the public water system.
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
water tightness of each check valve.
Any condition, device or practice in a water system or its
operation that creates or may create a danger to the health and well-being
of its users. The word "severe" as used to qualify "health hazard"
means a hazard to the health of the user that could reasonably be
expected to result in the significant morbidity or death.
An arrangement or device that will allow alternate but not
simultaneous use of two sources of water.
Water not safe for drinking, personal or culinary use.
Any individual, partnership, association, company, corporation,
municipality, municipal authority, political subdivision or any agency
of federal or state government. The term includes the officers, employees
and agents of any partnership, association, company, corporation,
municipality, municipal authority, political subdivision or any agency
of federal or state government.
The presence in water of any foreign substance that tends
to degrade its quality so as to constitute a 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 waters for domestic use.
Water which is satisfactory for drinking, culinary and domestic
purposes and meets the requirements of the Department of Environmental
Protection.
Any fluid or solution which may be chemically, biologically
or otherwise contaminated or polluted in a form or concentration such
as would constitute a health, pollutional or system hazard if introduced
into the public or a consumer's water system. This includes but
is not limited to:
Polluted or contaminated waters.
Process waters.
Used waters originating from the public water system which may
have deteriorated in sanitary quality.
Cooling waters.
Contaminated natural waters taken from wells, lakes, streams
or irrigation systems.
Chemicals in solution or suspension.
Oils, gases, acids, alkalis and other liquid and gaseous fluids
used in industrial or other processes or for firefighting purposes.
Heating system waters from boilers or heat pumps.
The water system owned and operated by the Borough of Oxford.
The term includes any collection, treatment, storage and distribution
facilities under control of the Borough and used in connection with
the system. The term includes collection or pretreatment storage facilities
not under such control which are used in connection with the system.
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 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 between the checks at less
than the supply 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.
The terminal end of a service line from the public water
supply system. If a meter is installed at the end of the service,
then the "service connection" means the downstream end of the meter.
A condition posing an actual or potential threat of damage
to the physical properties of the public water system or the consumer's
potable water system.
