The Double Check Type Backflow Preventer shall be certified to NSF/ANSI/CAN 61, rated to 180°, and supplied with UL/FM approved butterfly valves with supervisory switch. The main body and access covers shall be low lead bronze (ASTMB 584), the seat ring and all internal polymers shall be Noryl™ and the seat disc elastomers shall be silicone. The first andsecond check shall be located at an angle and accessible for maintenance from the top of the device, without removing thedevice from the line. The checks shall share a single access cover and the test cocks shall be accessible from the top ofthe device. The Double Check Type Backflow Preventer shall be a WILKINS Model 950XL3BFSS.
Compliance:
- NSFStandard61
- NSFStandard372
- ASSEStandards
- UPC
- UL
- IPC
- NPCC
- USC Confirmed
Features:
- Ideal for use where Lead Free* valves are required. Designed for installation on potable water lines to protect against both backsiphonage and backpressure of polluted water into the potable water supply. Assembly shall provide protection where a potential non-health hazard exists. Features slow closing resilient seated UL/FM approved butterfly shutoffs with supervisory switch. For indoor or outdoor use.
- Sizes 1 1/4", 1 1/2", 2"
- Minimum working water pressure: 20 PSI
- Maximum working water pressure: 175 PSI
- Minimum working water temperature: 33°F
- Maximum working water temperature: 180°F
- Hydrostatic test pressure: 350 PSI
- End connections Threaded: (FNPT) ANSI B1.20.1
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