follow Dictionary.com

Why is the ninth month called September?

backwater valve

noun
1.
a valve for preventing flowing liquid, as sewage, from reversing its direction.
Also called backflow valve.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source

Word of the Day

Difficulty index for backwater valve

Few English speakers likely know this word

Word Value for back

12
14
Scrabble Words With Friends