Types of Backflow Prevention Assemblies

Back to Gallery

"I received a letter from my water district...what are all these acronyms? RPP, DCDA, PVB...what does it all mean?" Let us remove the mystery in this gallery! There is also a page of definitions for your reference.

Types of Backflow Preventer

Reduced Pressure Principle Backflow Assembly Known as RP or RPP, the most widely used type of backflow device in San Diego County

Reduced Pressure Principle Manifold of RP devices with drains

RP-Compact Style A shorter installation length makes this style preferrable in some locations

Reduced Pressure Principle Detector Assembly Also called RPDA. Used where a low-flow bypass is required or desired

RPDA RPDA consists of two backflow preventers...the main line and the bypass line

RPDA Fire Line

Double Check Valve Also called DC. Used only when non-health hazard pollutants are present. Not for health hazards

Double Check Detector Assembly Also called DCDA. Used where low flow bypass is needed and no health hazards are present

DCDA consists of two backflow preventers...the main line and the bypass line

DCDA Bypass

2 inch DCDA in cage

2 inch DCDA side view

2 inch DCDA top view

Pressure Vacuum Breaker Also known as PVB

PVB