The DeringerTM 20G Double Check Valve Assembly is designed to prevent non-health hazard pollutants from entering the potable water supply system caused by backpressure and/or backsiphonage conditions.

Features
• lnline serviceable gate valves
• Stainless steel housing
• Tamper-resistant test cocks
• Patented Dual-actionTM check modules
- Poppet action at low flow
- Swing action at high flow
• Silicone elastomer check discs
• Stem Includes tamper switch groove
• AWWA C509/UL/FM resilient seated
gate valves (OS&Y)
• Flanged end ANSI B16.1 Class125
• Flexible groove coupling UL/FM