Field glossary

PRV (pressure reducing valve)

A spring-and-diaphragm valve that holds the downstream pressure at a setpoint below the higher upstream pressure; also called a pressure regulator

Used across 2 Anvilfield field guides, most in Plumbing.

Also defined as

A spring-and-diaphragm valve that holds building pressure below the street pressure; can fail low and choke the whole house

Where this shows up