The DeringerTM 30 Double Check Detector Assembly (DCDA-II) prevents non-health hazard pollutants from entering a potable water supply system when backpressure and/or backsiphonage conditions occur. Used primarily on fire sprinkler systems when monitoring of unauthorized water use is required.

Features
• Integral shutoff valves indoor/outdoor application
• 100% stainless steel housing
• Tamper-resistant test cocks
• Patented Dual-actionTM check modules
- Poppet action at low flow
- Swing action at high flow
• Lead Free* Bronze bypass components
• CuFt or gallons bypass meter
• DCDA-II single check bypass
• Silicone elastomer check discs
• Prewired supervisory switches
• Flange adapters available
• IPS grooved ends