Backflow preventer and relief valve assembly

Details Backflow preventer and relief valve assembly Backflow preventer and relief valve assembly

1976-03-19

1976-12-14

Cohan, Alan

Fluid handling

Line condition change responsive valves

Direct response valves

137215, F16K 1503

Patent

active

039969622

ABSTRACT:
A backflow prevention assembly designed for connection between a main supply line and a service pipe in water supply service, comprising two check valves in series and a relief valve for draining the chamber between the two check valves under certain operating conditions.

REFERENCES:
patent: 3817278 (1974-06-01), Elliott

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