Field glossary

Trap primer

A device that adds water to a seldom-used trap to keep its seal from evaporating dry, also called a trap seal primer

Used across 4 Anvilfield field guides, most in Plumbing.

Also defined as

A device that feeds water to a trap on a schedule so the seal does not evaporate, listed to ASSE 1018 or 1044
A device or line that feeds a trickle of water to a trap to keep its seal from evaporating in a dry receptor

Where this shows up