Patent ID: 6446665
Filing Date: 2002-09-10
Classification: F16K,Y10T

Abstract:
A backwater valve, comprising:a body having a substantially horizontal flow passage extending therethrough with an inlet side and an outlet side; a closure gate pivotally mounted within the body above the inlet side of the flow passage, the closure gate having an open position above the flow passage and a closed position blocking the inlet side of the flow passage to prevent a resersal of flow; a float activated locking member mounted on the body, the locking member having a locking position and a release position, in the locking position the locking member engaging and holding the closure gate in the open position, the float activated locking member being influenced by liquid rising in the body whereby the locking member is carried to the release position when the liquid rises above a preset level and upon release the closure gate closes by force of gravity to block the flow passage thereby preventing the reversal of flow.