Sleeving Through Footings

If you don't get the details right, a sleeve for a drain pipe or other mechanicals will weaken a concrete footing.

Water supply through footing

Water line through foundation

Flagpole Foundation Options

Support for services through footings - General Structural Issues - BuildHub.org.uk

Pipe Stubs Through Footing - Fine Homebuilding

Footing Drain Pipe Building America Solution Center

Footings JLC Online

Plumbing in Footings : r/StructuralEngineering

2021 INTERNATIONAL TINY HOUSE PROVISIONS: CODE, COMMENTARY AND STANDARDS FOR DESIGN