Deringer 20 Double Check Backflow Prevention Valve (DC)

The Deringer 20 (DC) is available in sizes 2 - 8 inches. It's the shortest, lightest, most economical backflow assembly on the market! Available online.

Testing Procedure for Double Check Valves

Model 20 American Backflow

The Deringer 20G Double Check Backflow Preventer w/ OS&Y Gate Valves prevents non-health hazard pollutants from entering a potable water supply system

Deringer 20G (DC)

2 1/2 Deringer 50 GPM Reduced Pressure Detector Assembly (RPDA-II)

DC vs RPZ: How is a Double Check Valve Different From an RPZ Valve?

Deringer Backflow Preventers

WS > backflow-repair-parts > deringer > Deringer-6-inch

NEW AMES DERINGER 20 3" Double Check Valve Backflow Preventer

Sprinkler backflow preventers being stolen in Littleton for scrap

BIM objects - Free download! Lightweight Stainless Steel Double