Fluid handling – Hydrant type – With casing
Patent
1991-12-23
1992-10-27
Walton, George L.
Fluid handling
Hydrant type
With casing
137302, 137360, 13761413, 13762527, 251318, E03B 712, E03B 914, F16K 11044
Patent
active
051581051
ABSTRACT:
An anti-siphon and freezeless water hydrant comprises a unitary cast metal housing which incorporates a hose bib, and a drain opening cylinder equipped with drain orifices and a drain valve seat. The housing is shaped and labeled to assure installation so that the hose bib is higher than the drain opening cylinder. A unitary valve stem includes an integral drain valve element which selectively engages or disengages the inside of the drain opening cylinder to shut off or open the drain orifices and a water valve element which selectively engages or disengages a water valve seat within the hydrant to act as a water valve. When the water valve is fully closed, the drain valve element opens the drain opening cylinder to permit water trapped within the hydrant to drain through the the drain orifices. The hose bib is equipped with a vacuum valve to prevent back-siphoning of fluids from a hose attached to the hydrant.
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