Self-draining backflow prevention valves

Details Self-draining backflow prevention valves Self-draining backflow prevention valves

E - Fixed Constructions

03

B

137/147

E03B 7/12 (2006.01) E03C 1/10 (2006.01)

Patent

CA 2030132

ABSTRACT OF THE DISCLOSURE The present invention comprises an automatic self-draining backflow prevention valve having an internal cylindrical resilient sleeve that expands or contracts in response to water pressure to coact with a two way valve that provides for automatic self-draining of both the water faucet and the backflow prevention valve when the water faucet is shut off.

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