Deringer 20G Double Check Backflow Preventer with Gate Valves

Deringer 20G (DC) double check backflow preventer with OS&Y gate valves, sizes 2.5 - 8 inches. The shortest, lightest, most economical backflow assembly.

Deringer 20G Double Check Backflow Preventer with Gate Valves

Deringer 30X/30GX - Ames Fire & Waterworks

Deringer 20G Double Check Backflow Preventer with Gate Valves

Deringer 20 Double Check Backflow Prevention Valve (DC)

Double Check Valve Assemblies

Backflow Preventers - Valves - Ferguson

Deringer 20G Double Check Backflow Preventer with Gate Valves

Deringer 20/20G - Ames Fire & Waterworks

Deringer 20 Double Check Backflow Prevention Valve (DC)

Amoskeag Auction Company

The Deringer 40G Reduced Pressure Backflow Preventer w/ OS&Y Gate Valves prevents non-health hazard pollutants from entering a potable water supply

Deringer 40G (RP)

Deringer 20GX Double Check Backflow Preventer with OS&Y Gate Valves