backwater valve


noun

a valve for preventing flowing liquid, as sewage, from reversing its direction.

Nearby words

  1. backwardly,
  2. backwardness,
  3. backwards,
  4. backwash,
  5. backwater,
  6. backwind,
  7. backwood,
  8. backwoods,
  9. backwoodsman,
  10. backword

Also called backflow valve.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019