flap valve

American  

noun

1. clack valve.

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Etymology

Origin of flap valve

First recorded in 1865–70

Example Sentences

A flap valve is provided between the two chambers to prevent the gasoline in the lower one from being sucked back into the upper one.

From Aviation Engines Design?Construction?Operation and Repair by Pag?, Victor Wilfred

The churned-up soil is removed by a sand pump, which is a hollow tube with a flap valve at the lower end opening inwards and a hook on the upper end.

From Rural Hygiene by Ogden, Henry N. (Henry Neely)

A light flap valve to keep out the cold in winter is also a desirable feature for the overflow pipe.

From Rural Hygiene by Ogden, Henry N. (Henry Neely)

Schemes have been suggested in which it was proposed to utilise a flap valve on the outlet so as to render the discharge of the sewage automatic.

From The Sewerage of Sea Coast Towns by Adams, Henry C.

Refrigerator waste pipes, except in tenement houses, and all safe-waste pipes, must have brass flap valve on the lower ends.

From Elements of Plumbing by Dibble, Samuel Edward