How to Install a Backwater Valve | DoItYourself.com
How to Install a Backwater Valve | DoItYourself.com
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A sewer backwater valve is a simple device that can save your basement from a major disaster. Installed on your main sewer line, this one-way valve allows sewage to leave your home but automatically closes if the municipal sewer backs up. When pressure builds from the city side, the hinged gate locks down to prevent sewer water from flowing back into your basement. You might notice a slow drain or a small puddle near a floor drain when it activates—but that minor inconvenience is far better than
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