What is a detector check valve?

The Single Check and Single Detector Check Valve Assembly backflow preventer protects against backflow by either back-pressure or back-siphonage from a cross-connection between potable water systems and substances in low hazard conditions in fire sprinkler systems.Prevention of single control flow and return of the single detector protects against back pressure or return of the flow of a link between drinking water systems and low-risk substances in fire water systems.