Reduced pressure principle backflow prevention device definition

Reduced pressure principle backflow prevention device means a device containing a minimum of two independently acting check valves together with an automatically operated pressure differential relief valve located between the two check valves and approved under ASSE Standard 1013. 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 check valves at less than the supply pressure. The unit must include tightly closed shutoff valves located at each end of the device, and each device shall be fitted with properly located test cocks.

Reduced pressure principle backflow prevention device means an assembly consisting of two (2) independently operating approved check valves with an automatically operating differential relief valve located between the two (2) check valves, tightly closing resilient seated shut-off valves, plus properly located resilient seated test cocks for the testing of the check valves and the relief valve.

Reduced pressure principle backflow prevention device means a device incorporating two or more check valves and an automatically operating differential relief valve located between the two checks, a tightly closing shut-off valve on each side of the check valve assembly, and equipped with necessary test cocks for testing.

Examples of Reduced pressure principle backflow prevention device in a sentence

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• Reduced pressure principle backflow prevention device" means a device incorporating two or more check valves and an automatically operating differential relief valve located between the two checks, two shutoff valves and equipped with necessary appurtenances for testing.

• Reduced pressure principle backflow prevention device shall mean an assembly consisting of two (2) independ- ently operating approved check valves with an automatically operating differential relief valve located between the two check valves, tightly closing resilient seated shut-off valves, plus properly located resilient seated test cocks for the testing of the check valves and the relief valve.

• Reduced pressure principle backflow prevention device (RP) - The approved reduced pressure principle backflow prevention device shall be installed on the user's side of and as close to the service connection as is practical.

• Reduced pressure principle backflow prevention device means a device incorporating two or more check valves and an automatically operating differential relief valve located between the two check valves, two shutoff valves and equipped with necessary appurtenances for testing.

More Definitions of Reduced pressure principle backflow prevention device

Reduced pressure principle backflow prevention device means an Approved device incorporating two or more independently acting, approved check valves and an automatically operating differential relief valve located between the two checks, two shut-off valves, and equipped with necessary appurtenances for testing. The device shall operate to maintain the pressure in the zone between the two check valves less than the pressure on the public water supply side of the device. At cessation of normal flow, the pressure between check valves shall be less than the supply pressure. In case of leakage of either check valve, the differential relief valve shall operate to maintain this reduced pressure by discharging to the atmosphere. When the inlet pressure is two pounds per square inch or less, the relief valve shall open to the atmosphere thereby providing an air-gap in the device. To be approved, these devices must be readily accessible for maintenance and testing and installed not less than 12 inches above the flood level of the surrounding ground or floor in a location where no part of the valves max height will be submerged.

Reduced pressure principle backflow prevention device means a device containing a minimum of two

Reduced pressure principle backflow prevention device means an assembly consisting of two (2) independently operating approved check valves with an automatically operating differential relief valve located between the two (2) check valves, tightly closing shut-off valves on each side of the check valves plus properly located test cocks for the testing of the check valves and the relief valve. (Ord. #566, May 2003)

Reduced pressure principle backflow prevention device means a device 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 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

Reduced pressure principle backflow prevention device means a device incorporating two or more check valves and an automatically operating differential relief valve equipped with the necessary appurtenances for testing. The device shall operate to maintain the pressure in the zone between the two check valves less than the pressure on the public water supply side of the device.

Reduced pressure principle backflow prevention device or "RPZ device" means a device containing a minimum of two independently acting check valves together with an automatically operated pressure differential relief valve located between the two check valves. an assembly designed to prevent backsiphonage or backpressure backflow used for high or low hazard situations, composed of two independently operating spring-loaded check valves together with

Reduced pressure principle backflow prevention device means an assembly consisting of two (2) independently operating approved check valves with an automatically operating differential relief valve located between the two