flap valve
Americannoun
Etymology
Origin of flap valve
First recorded in 1865–70
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
A light flap valve to keep out the cold in winter is also a desirable feature for the overflow pipe.
From Rural Hygiene by Henry N. (Henry Neely) Ogden
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 Victor Wilfred Pag?
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 Samuel Edward Dibble
It consists of a cylindrical chamber, a, ending in a narrower tube, c, which forms the seating for a flap valve, d, to which the hammer or clapper, e, is fixed.
From Scientific American Supplement, No. 458, October 11, 1884 by Various
First of all, a flap valve under such conditions would not remain watertight, unless it were attended to almost every day, which is, of course, impracticable when the outlet is below water.
From The Sewerage of Sea Coast Towns by Henry C. Adams
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