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Backflow prevention device
A backwater valve is a backflow prevention device used to prevent outbound water through a dwelling's drain pipes from re-entering -- "back flowing"—into a home. The valve contains a flap that allows water to exit the home, but closes to prevent the back flow into the home.[1]
Backwater valves commonly activate when a city's sewer lines are unable to handle a large amount of falling precipitation; this puts homes that are tied into the storm lines at risk of having water back flow into them.[citation needed]
There is a big difference between backwater valves and backflow preventers:[citation needed]
A backwater valve prevents raw sewage from backing up into your home through your toilets, showers, etc.
A backflow preventer deals with protecting a potable water source from being contaminated by a reverse flow of foul water (ex: isolating your toilet's flush cistern and water supply from the toilet bowl water itself).
^"Backwater Valve". www.london.ca. Archived from the original on 2019-12-11. Retrieved 2021-11-23.
A backwatervalve is a backflow prevention device used to prevent outbound water through a dwelling's drain pipes from re-entering -- "back flowing"—into...
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the water level in a bath or basin. Backwater sanitary valves (also known as "check valves" or "backwatervalves") are also often referred to as "backflow...
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limit inflow of excess water into municipal sanitary sewer systems. Backwatervalves reduce the "risk of sewer backup through isolation of homes from underground...
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der Aer, by Hendrick Goltzius (1603) Sea shells found in the creek and backwater of the coast of west India are used as an additive to poultry feed. They...
alevin – The life cycle of salmon begins and usually also ends in the backwaters of streams and rivers. These are their spawning grounds, where salmon...
for angling. Water is supplied by Scottish Water from Lintrathen and Backwater reservoirs in Glen Isla. Electricity distribution is by Scottish and Southern...
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to Begin", #2 "But Without Orifices", #3 "Aimez-Vous Holman Hunt?"), "Backwater", Enigma series, Three Enigmas II: The Eternal Theme Of Exile (#1 "The...
galactic core, the outer worlds, including Earth, have become neglected backwaters. With humanity now numbering in the thousands of trillions across thousands...
mostly been moved from their original leading-edge sites to some quiet backwater, often pumping water into canals, where they languished with only intermittent...
the left valve are two equally long, stout, triangular pseudocardinal teeth; and two short, slightly curved lateral teeth. In the right valve are one strong...
pipe burst is the loosening of the flange bolt connection. The damaged valve was rectified in July 2009. "Ponmudi Dam – KSEB Limited Dam Safety Organisation"...
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