Anti-siphon frost free faucet

作者: Louis F. Enterante , Frank L. Enterante

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摘要: An anti-siphon frost free faucet having a neck portion that includes an back flow preventer interposed between the and hose, water drain means positioning at lowest point in said to facilitate complete drainage of when supply is turned off air vent on operable allow into assure optimum pressure operate means.

参考文章(4)
Robert D. Francisco, Faucet drain apparatus ,(1986)
Donald E. Carlson, Frostproof backflow preventer ,(1976)