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backwater valve

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

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