Specification History

SWS Version Created Specification ID Title Specification Objective Supporting Materials Rationale Status
Version 2025 03/02/2021 - 11:22 2.0401.3b Airtight Drains

Install a one way valve in all untrapped, below grade drain fittings that does not interfere with appropriate drain function

Prevent air infiltration from below grade drains without affecting drain function

 Black Line
Version 2025 03/02/2021 - 11:22 2.0401.3b Airtight Drains

Install a one way valve in all untrapped, below grade drain fittings that does not interfere with appropriate drain function

Prevent air infiltration from below grade drains without affecting drain function

 Black Line