Lightweight Stainless Steel Double Check Detector Type II Assemblies with Integral Butterfly or OSY Shutoffs - Deringer 30/30G

Ames Deringer™ 30 and 30G Double Check Detector Type II Assemblies are designed to prevent non-health hazard pollutants from entering the potable water supply system caused by backpressure and/or backsiphonage conditions. Deringer 30 features integral Eccentric-seal™ butterfly shutoff valves for a short lay length, and Dual-action™ checks for high performance at low- and high-flow rates. Deringer 30G also features Dual-action checks, but with OS&Y shutoff valves.The Type II bypass is used to monitor unauthorized water usage and is primarily required on fire sprinkler systems.

Either may be installed under continuous pressure service to protect against both backpressure and backsiphonage. Maximum working pressure: 175psi (12 bar).