Reduced pressure principle backflow prevention assembly means a backflow-prevention assembly that contains two independently acting check valves; a hydraulically operating, mechanically independent pressure differential relief valve located between the two check valves; tightly closing, resilient seated shut-off valves on each end of the check valve assembly; and properly located resilient seated test cocks.
Reduced pressure principle backflow prevention assembly means a backflow prevention device consisting of two independently acting internally loaded check valves, a differential pressure relief valve, four properly located test cocks, and two isolation valves.
Reduced pressure principle backflow prevention assembly means an assembly containing a minimum of two independently acting check valves together with an automatically operated pressure differential relief valve located between two check valves. During normal flow and 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 check valves 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.
Examples of Reduced pressure principle backflow prevention assembly in a sentence
Reduced pressure principle backflow prevention assembly provides protection from backflow due to both backpressure and backsiphonage.
Reduced pressure principle backflow prevention assembly must be installed in a horizontal position and in a location in which no portion of the assembly can become submerged in any substance under any circumstances (pit installations are prohibited).
Double check detector fire protection backflow prevention assembly.3. Reduced pressure principle backflow prevention assembly (RP).4.
Double check detector fire protection backflow pre- vention assembly.3. Reduced pressure principle backflow prevention assembly (RP).4.
A Reduced pressure principle backflow prevention assembly shall be located directly behind the meter and shall be installed a minimum of twelve inches (12") above grade and not more than thirty-six inches (36") above grade measured from the bottom of the device and with a minimum of twelve inches (12") side clearance in a manner where the assembly is readily accessible for testing and maintenance unless otherwise approved by the GOWC.
More Definitions of Reduced pressure principle backflow prevention assembly
Reduced pressure principle backflow prevention assembly or "RP" means an assembly containing two independently acting approved check valves, together with a hydraulically operating, mechanically independent pressure differential relief valve located between the check valves and at the same time below the first check valve. The unit shall include properly located resilient seated test cocks and tightly closing resilient seated shutoff valves at each end of the assembly. This assembly is designed to protect against a non-health hazard or a health hazard.
Reduced pressure principle backflow prevention assembly means a backflow prevention assembly consisting of two independently acting internally loaded spring check valves, a differential pressure relief valve, four properly located test cocks, and two isolation valves. Commonly referred to as an RP or and RPZ.
Reduced pressure principle backflow prevention assembly means an assembly containing within its structure a minimum of two (2) independently acting, approved check valves, together with a hydraulically operating, mechanically independent, pressure differential relief valve located between the check valves and at the same time below the first check valve. The assembly is designed to protect against a health hazard.
Reduced pressure principle backflow prevention assembly means an approved backflow prevention assembly incorporating two (2) internally loaded check valves and an automatically operating differential relief valve located between the two check valves, including resilient seated shut-off valves on each end of the assembly, and equipped with necessary test cocks for testing the assembly.
Reduced pressure principle backflow prevention assembly means an assembly containing two independently acting approved check valves together with a hydraulically operating mechanically independent pressure differential relief valve located between the two check valves and below the first check valve.
Reduced pressure principle backflow prevention assembly means a backflow-prevention assembly which that contains includes not less than two 2 independently acting check valves; an automatically
Reduced pressure principle backflow prevention assembly means an assembly containing within its structure a minimum of two independently acting, approved check valves together with a hydraulically operating, mechanically independent, pressure differential relief valve located between the check valves and at the same time below the first check valve. The first check valve reduces the supply pressure to a predetermined amount so that, during normal flow and at cessation of normal flow, the pressure between the checks shall be less than the supply pressure. In case of leakage of either check valve, the pressure differential relief valve, by discharge to atmosphere, shall operate to maintain the pressure between the checks less than the supply pressure. The unit shall include tightly closing shutoff valves located at each end of the assembly and each assembly shall be fitted with properly located test cocks. The assembly is designed to protect against a health hazard (i.e., contaminant). Such a device must be on the USCFCCHR and the ASSE approval lists.