Field glossary

PVB

Pressure vacuum breaker; one check and an air inlet, back-siphonage only, holds continuous pressure, testable (ASSE 1020)

Used across 2 Anvilfield field guides, most in Plumbing.

Also defined as

Pressure vacuum breaker, a single check plus an air inlet for backsiphonage-only protection (ASSE 1020)

Where this shows up