Reduced pressure principle backflow preventer definition

Reduced pressure principle backflow preventer means a device composed of two (2) tightly closing shutoff valves surrounding two (2) independently acting pressure reducing check valves that, in turn, surround an automatic pressure differential relief valve, and four (4) test cocks, one (1) upstream of the five (5) valves and one (1) between each of the four

Reduced pressure principle backflow preventer means a type of cross connection control assembly which contains 2 independently acting check valves, separated by an intermediate chamber or zone in which there is a hydraulically operated means for venting to atmosphere, and includes 2 shut−off valves and 4 test cocks.

Reduced pressure principle backflow preventer means an assembly consisting of two independently operating approved check valves with automatically operating differential relief valve located between the two 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.

Examples of Reduced pressure principle backflow preventer in a sentence

• Reduced pressure principle backflow preventer assemblies, double check-valve assemblies, pressure vacuum breaker assemblies, reduced pressure detector fire protection backflow prevention assemblies, double check detector fire protection backflow prevention assemblies, hose connection backflow preventers, and spill-proof vacuum breakers shall be tested at the time of installation, immediately after repairs or relocation and at least annually.

• Reduced pressure principle backflow preventer assemblies, double check-valve assemblies, double-detector check valve assemblies and pressure vacuum breaker assemblies shall be tested at the time of installation, immediately after repairs or relocation and at least annually.

• Reduced pressure principle backflow preventer assemblies, double check-valve assemblies, double-detector check valve assemblies, and pressure vacuum breaker assemblies shall be tested at the time of installation, immediately after repairs or relocation and at least annually.

• Reduced pressure principle backflow preventer assemblies, double check-valve assemblies, double-detector check valve assemblies and pressure vacuum breaker assemblies shall be tested at the time of installation, immediately after repairs or relocation and when otherwise required by the Water Resources Services Division.

• Reduced pressure principle backflow preventer assemblies, double check-valve assemblies, pressure vacuum breaker assemblies, reduced pressure detector fire protection backflow prevention assemblies, double check detector fire protection backflow prevention assemblies, hose connection backflow preventers, and spillproof vacuum breakers shall be tested at the time of installation, immediately after repairs or relocation and at least annually.

More Definitions of Reduced pressure principle backflow preventer

Reduced pressure principle backflow preventer means a type of cross connection control assembly which contains 2 consisting of two independently acting check valves, internally force loaded to a normally closed position and separated by an intermediate chamber or zone in which there is a hydraulically operated relief means for venting to atmosphere, internally force-loaded to a normally open position. These assemblies are designed to operate under continuous pressure conditions. The assembly shall include two properly located, tightly closing and includes 2 shut-off valves and 4 four properly located test cocks.

Reduced pressure principle backflow preventer 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. 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. Theunit must include tightly closing shutoff valves located at each end of the device, and each device shall be fitted with properly located test cocks.

Reduced pressure principle backflow preventer means a type of cross connection control device which contains 2 independently acting check valves, separated by an intermediate chamber or zone in which there is a hydraulically operated means for venting to atmosphere, and includes 2 shut−off valves and 4 test cocks. The term “RP” has the same meaning as reduced pres- sure principle backflow preventer.

Reduced pressure principle backflow preventer means an assembly of differential valves and check valves including an automatically opened spillage port to the atmosphere designed to prevent backflow.

Reduced pressure principle backflow preventer means a device composed of two (2) tightly closing shut-off valves

Reduced pressure principle backflow preventer means a cross connection control assembly consisting of 2 inde- pendently−acting check valves, internally force−loaded to a nor- mally closed position and separated by an intermediate chamber or zone in which there is a hydraulically operated relief means for venting to atmosphere, internally force−loaded to a normally open position. These assemblies are designed to operate under continu- ous pressure conditions. The assembly shall include 2 properly located, tightly closing shut−off valves and properly located test cocks.

Reduced pressure principle backflow preventer means a device composed of two (2) tightly closing shut-off valves surrounding two (2) independently acting pressure reducing check valves that, in turn, surround