🔧

Plumbing Reference

Pipe sizing · Fixture units · Rough-in dims · Materials

Nominal sizes, OD/ID, and common use cases for supply & drain pipe.

DFU values, minimum supply/drain sizing, stack & vent rules of thumb.

Standard rough-in heights and offsets for common fixtures.

Pros, cons, and typical uses for PEX, copper, CPVC, PVC, ABS, and cast iron.