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float valve

a valve admitting or discharging a liquid to or from a tank and regulated by a float on the surface of the liquid within the tank to maintain a nearly constant height of liquid.
Origin of float valve
First recorded in 1870-75 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Historical Examples
  • This is usually caused by foreign matter getting under or in the float valve, so that it will not properly seat.

    Motors James Slough Zerbe

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