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50H Vacuum Breaker - Brass Add-on to any 3/4" hose connection. UPGRADE to the 50H. The first ASSE 1052 Approved automatic draining double-check backflow preventer. When a hose is removed from a Model 50 equipped wall faucet or yard hydrant two linked but independent check valves automatically move as one to open a path through the valve allowing water to drain completely and prevent freezing.
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$36.35