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Can backwater valves prevent sanitary water from moving back up into the foundation drain?

April 26, 2017backwater drain foundation moving sanitary valves water

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Can backwater valves prevent sanitary water from moving back up into the foundation drain?

1 Answer

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Yes, but backwater valves on sanitary services are only required on new or upgraded service laterals in the combined sewer area or in areas with a history of flooding.