What do a.m. and p.m. stand for?

backwater valve

a valve for preventing flowing liquid, as sewage, from reversing its direction.
Also called backflow valve. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for backwater valve
  • Where the building is subject to backwater, the subsoil drain shall be protected by an accessibly located backwater valve.
  • As a property owner, you are responsible for your cleanout and backwater valve.
  • Maintain and inspect the backwater valve as recommended by manufacturer.
  • Confirms backwater valve is accessible for service or replacement, if installed.
  • Install a backwater valve on the private building sewer to prevent the backflow of sewage from the public line.
  • Direction on checking for backwater valve or need therefore.
  • The backwater valve shall be installed in a round precast concrete valve box with a perforated cover.
  • Recommended installation of backwater valve to store connection.
  • When connected to the sanitary system discharge line piping shall have an accessible backwater valve and gate valve.

Word of the Day

Difficulty index for backwater valve

Few English speakers likely know this word

Word Value for backwater

Scrabble Words With Friends