Freeze resistant automatic draining wall hydrant with dual check vacuum breaker
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United States of America Patent
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-
Jun 22, 2004
Grant Date -
N/A
app pub date -
May 30, 2002
filing date -
May 30, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The wall hydrant is automatically draining, providing freeze resistant, and includes protections against contamination of a building's potable water supply from the backflow of water in an attached hose. In particular, a dual check hose connection backflow preventer provides protection against back pressure from a hose fill of water which is elevated 10 feet. In addition, protection is provided from back siphonage due to a reduction of pressure in the potable water system within the building. Finally, a biased open atmospheric vent is located between the two independent checks to further assure the protection against backflow from the hose to the potable water system.
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