AC247 Backwater Valves—Approved February 2004 (PDF Download)

Item #: AC247
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AC247 establishes guidelines for evaluation of backwater valves installed in building drain or sewer pipe to prevent backflow of sewage in buildings where the flood-level rim of a plumbing fixture is below the elevation of the manhole cover of the next upstream manhole in the public sewer.

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AC247 establishes guidelines for evaluation of backwater valves installed in building drain or sewer pipe to prevent backflow of sewage in buildings where the flood-level rim of a plumbing fixture is below the elevation of the manhole cover of the next upstream manhole in the public sewer.

Pages 3
Publisher ICC-ES
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