Plumbing Pipe General Installation Requirements

Connection of Drainage Pipes and Fixtures to Sewer Systems
1. Connect all plumbing drainage pipes, fixtures, and appliances to the building’s sanitary sewer system (sewer or septic system). No part of the plumbing system should receive water from the system without providing a means to dispose of the water into the building’s sanitary sewer system.
2. You may connect bathtubs, showers, sinks, and clothes washers to an approved gray water recycling system. Refer to IRC Appendix O for gray water recycling system requirements.

Flood-Resistant Installation (P2601.3)
1. Install water supply and drainage systems (pipes) so that they will not admit or discharge contents during flooding. Apply this rule to flood prone areas defined by the local building official.

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