Performance Requirements for Hose Connection Backflow Preventers
|Publication Date:||3 May 2016|
A hose connection backflow preventer shall consist of two independent checks, force loaded or biased to a closed position, with an atmospheric vent located between the two check valves, which is force loaded or biased to an open position, and a means for attaching a hose.
Size Range The device shall have male hose threaded outlets sized ½ NPHS, ¾ NPHS or 1 NPHS. Hose threads shall conform to Standard ANSI/ASME B1.20.7. Inlets with hose threads shall be provided with a non-removable feature.
Pressure Range The devices shall operate at pressures from 0 psi (0 kPa) to 125.0 psi (861.9 kPa).
Temperature Range The devices shall operate at temperatures from 33.0 °F (0.6 °C) to 140.0 °F (60.0 °C).
Repairability Devices shall be repairable