New Video: How to Maintenance the Deringer 30 (DCDA-II)

We are excited to announce that the next series of our maintenance videos are now available.This series covers the isolation, disassembly, maintenance, troubleshooting and reassembly of the 2 1/2" - 4" Deringer 30 DCDA. These videos can be viewed on the Backflow Direct YouTube Channel or on our website on the Downloads Page. Subscribe to the Backflow Direct Youtube Channel to view new videos first.

This is an instructional video on how to maintenance the 2 ½" - 4" Deringer 30 Double Check Detector Assembly Backflow Preventer. The Deringer 30 Double Check Detector Assembly 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 unathorized water use is required.