Reduced pressure backflow assembly definition

Reduced pressure backflow assembly. (RPBA) means a type of
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Reduced pressure backflow assembly. (RPBA) means an approved assembly consisting of two independently operating check valves, spring loaded to the closed position, separated by a spring loaded differential pressure relief valve loaded to the open position, an installed as a unit with and between two resilient seated shutoff valves and having suitable connections for testing. The assembly must operate to maintain the pressure in the zone between the two check valves, less than the pressure on the public water system side of the device. At cessation of normal flow, the pressure between the check valve must be less than the supply pressure. In case of leakage of either check valve, the differential relief valve must operate to maintain the reduced pressure by discharging to the atmosphere. When the inlet pressure drops below two (2) pounds per square inch (13.8 kPa) the relief valve must open to the atmosphere thereby providing an atmospheric zone between the two check valves. (Ord. 1349 §1(part), 2003: Ord. 1190 §3(part), 1996).
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Reduced pressure backflow assembly. (RPBA) means an assembly incorporating two check valves and an automatically operating differential relief valve, located between the two shutoff valves, and equipped with necessary appurtenances for testing. This assembly may be used for non-health and health-hazard applications.
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Examples of Reduced pressure backflow assembly in a sentence

  • Reduced pressure backflow assembly and hot box shall comply with all of the responsible utility district’s requirements.


More Definitions of Reduced pressure backflow assembly

Reduced pressure backflow assembly. (RPBA) means an approved assembly consisting of two independently operating check valves, spring loaded to the closed position, separated by a spring loaded differential pressure relief valve loaded to the open position, and installed as a unit with and between two resilient seated shutoff valves and having four suitable test cocks for checking the water tightness of the check valves and the operation of the relief valve.
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Reduced pressure backflow assembly means an approved assembly containing two independently acting approved check valves together with a hydraulically-operatedhydraulically operated, mechanically independent pressured differential relief valve located between the check valves and at the same time below the first check valve. The assembly shall include properly located test cocks and tightly resilient seated shut-off valves at the ends of the assembly, and unions at the ends of the assembly.
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