backwater valve

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backwater valve [′bak‚wȯd·ər ‚valv]

(engineering)

A type of check valve in a drainage pipe; reversal of flow causes the valve to close, thereby cutting off flow. Also known as backflow valve.

backwater valve, backflow valve

A type of check valve in a drainage pipe; reversal of flow causes the valve to close, thereby cutting off flow.

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