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flap valve

Origin of flap valve
1865-70 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for flap valve
  • Leaks in toilets can occur at the overflow pipe or at the plunger ball or flap valve on the bottom of the toilet tank.
  • Overflows must be screened or equipped with a flap valve to prevent the entrance of birds, animals and insects.
  • Overflow and drain lines are screened or protected with an angle-flap valve.
  • The sample is forced up the inside of the hollow tube and is held in place with a basket trap or flap valve.

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