backwater valve


Also found in: Acronyms.

backwater valve

[′bak‚wȯd·ər ‚valv]
(engineering)
A type of check valve in a drainage pipe; reversal of flow causes the valve to close, thereby cutting off flow. Also known as backflow valve.

backwater valve, backflow valve

A type of check valve in a drainage pipe; reversal of flow causes the valve to close, thereby cutting off flow.
References in periodicals archive ?
This Project will provide for the installation of a backwater valve on forty-six (46) different side sewers, in Everett, Washington.
Avoid spending money on a solution that does not keep the water out and look for products that are tested and certified by entities like the National Flood Barrier Testing and Certification Program, which tests temporary flood barriers, closure devices, backwater valves and flood mitigation pumps.
Product lines include STI[TM] Gasketed Sewer SDR 35, Heavy Wall Gasketed Sewer SDR 26, Ultra Heavy Duty[TM] Gasketed Sewer SDR 14, Perfect Fit[TM] Solvent Weld DWV, C900, Backwater Valves, Electrical and much more.
a Hayden, Idaho, manufacturer with a unique line of patented extendable backwater valves.