Single Detector Check Valve Assembly
•Where allowed by plumbing codes, the Single Detector Check Valve can be used as a cross connection prevention device between potable water systems and substances that are non-health hazards in fire sprinkler systems.
Single detector check valves are commonly used in fire protection systems to prevent backflow and monitor and record unauthorized use of water.
Note: A Single Detector Valve is not adequate for low or high hazard backflow prevention.
Features
Dolor Sit Amet
- Built to city and municipal specifications
- Designed for use in fire protection feed lines
- Factory pre-assembled and tested
- Precast concrete vault and access hatchway
- OEM top name components
- Optional metered by-pass and OS&Y shut-off available
In a non-flow condition, a single detector check valve, the check valves in the by-pass and mainline units are closed. Flows from 0 to 5 GPM will flow through the by-pass that contains a by-pass detector meter where unauthorized usage of water is recorded.
This operation at low flow rates is accomplished by designing the differential pressure drop across the by-pass line to be slightly less than the mainline check valve. Flows in excess of 5 GPM will open the mainline check valve for normal flow.
Caption:
Single Detector Check Valve Assembly (Watts Series 800)
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