Fire extinguishers – Alarms
Patent
1991-12-20
1994-03-29
Mitchell, David M.
Fire extinguishers
Alarms
169 16, G08B 1704
Patent
active
052976351
ABSTRACT:
A backflow prevention and flow detection arrangement is provided by a first and a second check valve with a passageway provided between the check valves. The second check valve may be an alarm valve with an alarm which is sounded when the alarm valve is open. Bypass meter piping is provided to record a flow through the main conduit with the bypass meter piping having a check valve to maintain the integrity of the backflow preventer. Preferably, an inlet of the bypass meter piping is providing in fluid communication with the main conduit between the first and second check valves.
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Hoge Gary C.
Mitchell David M.
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