check valve

noun
a valve permitting liquids or gases to flow in one direction only.
Origin:
1875–80

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
check valve
 
—n
Also called: nonreturn valve a valve that closes by fluid pressure to prevent return flow

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Check valve is always a great word to know.
So is ninnyhammer. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a fool or simpleton; ninny.
LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...
Example sentences
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Functional main water line check valve and main water line low pressure drain.
The check valve must be located upstream from the injection point.
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