For the purpose of this subchapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
BACKFLOW.
The flow of water or other liquids, mixtures, or substances under positive or reduced pressure in the distribution pipes of a potable water supply from any source other than its intended source.
BACKFLOW PREVENTER.
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, and barometric loop.
(1) AIR GAP.
A physical separation sufficient to prevent backflow between the free-flowing discharge end of the potable water system and any other system.
(2) ANNUAL.
A time period from January 1 to December 31.
(3) ATMOSPHERIC VACUUM BREAKER.
A device which prevents backsiphonage by creating an atmospheric vent when there is either a negative pressure or sub-atmospheric pressure in a water system.
(4) DOUBLE CHECK VALVE ASSEMBLY.
An assembly of two independently operating spring loaded check valves with tightly closing shut off valves on each side of the check valves, plus properly located test cocks for the testing of each check valve.
(5) HOSE BIBB VACUUM BREAKER.
A device which is permanently attached to a hose bibb and which acts as an atmospheric vacuum breaker.
(6) 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. Device includes tightly closing shutoff valves on each side of the check valves and properly located test cocks for the testing of the check valve(s).
(7) REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER.
An assembly consisting of two independently operating approved check valves with an automatically operating differential relief valve located between the 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.
BACKPRESSURE.
A condition in which the customer's system pressure is greater than the supplier's system pressure.
BACKSIPHONAGE.
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 the sudden reduction of pressure in the potable water supply system.
BOARD.
The city Utility Board.
BOOSTER PUMP.
A pump installed on a pipeline to increase water pressure or flow.
CONTAINMENT.
A method of backflow prevention which requires a backflow prevention preventer at the water service entrance.
CONTAMINANT.
A substance that will impair the quality of the water to a degree that it creates a serious health hazard to the public leading to poisoning or the spread of disease.
CROSS CONNECTION.
Any actual or potential connection between the public water supply and a source of contamination or pollution.
CUSTOMER.
Any person who has legal title to, or license to operate or habitat in, a property upon which a cross connection inspection is to be made or upon which a cross connection is present.
FIXTURE ISOLATION.
A method of backflow prevention in which a backflow preventer is located to correct a cross connection at an in-plant location rather than at a water service entrance.
IDEM RULE 327 I.A.C. 8-10.
Rule 327 I.A.C. 8-10 or the most recently promulgated rule.
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.
SUPERINTENDENT.
The city Water Superintendent.
(Ord. 2009-23, passed 8-18-2009; Am. Ord. 2013-34, passed 10-24-2013)