flap valve

American  

noun

1. clack valve.

---

Etymology

Origin of flap valve

First recorded in 1865–70

Example Sentences

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 Adams, Henry C.

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

From the bottom of the condenser a short pipe leads to the air pump J, and in this pipe there is a flap valve, called the foot valve, opening towards the air pump.

From A Catechism of the Steam Engine by Bourne, John, C.E.

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)