Deringer 50/50G

Lightweight Stainless Steel Reduced Pressure Detector Type II Assembly Backflow Preventers with Integral Butterfly or OSY Shutoffs

Deringer 50/50G

Lightweight Stainless Steel Reduced Pressure Detector Type II Assembly Backflow Preventers with Integral Butterfly or OSY Shutoffs

Features

Integral shutoffs for shorter lay length and lightweight construction (Deringer 50 only)
Bow-seal™ full access cover for lower weight and easy access to valve internals
Dual-action check module for low- and high-flow performance
Tamper-resistant test cocks
Type II bypass for lower weight and simplified testing
Optional flood sensor connection kit to detect flowing discharge from the relief valve; provides dry contact output for BMS integration

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Nexa pairs integrated sensing hardware with free, upgradable software to empower facilities with unprecedented visibility and control over their water systems, helping teams protect assets, deliver consistent performance, and drive measurable ROI.
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Ames Deringer™ 50 and 50G Reduced Pressure Detector Type II Assemblies are designed to prevent hazardous contaminants and non-health hazard pollutants from entering the potable water supply system caused by backpressure and/or backsiphonage conditions.

Deringer 50 features integral Eccentric-seal™ butterfly shutoff valves for a short lay length, and True-Seal™ and Dual-action™ checks for high performance at low- and high-flow rates. Deringer 50G 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: 175 psi (12 bar).

An optional flood sensor connection kit is available to detect flowing discharge from the relief valve. The sensor and activation module install externally and do not affect assembly performance for certifications. When a qualifying discharge occurs, the sensor energizes a relay that signals a flood condition to the building management system.

Approval/Certification Information

For product-specific approval information, please refer to the product’s specification sheet (see literature section above) or ask a Watts representative. Some certification agencies allow you to search by product name and brand.