Watts 1-1/2 - LF909 Small RPZ Backflow Preventer with Flood Sensor, 1-1/2"
Watts 1-1/2 - LF909 Small RPZ Backflow Preventer with Flood Sensor, 1-1/2"
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The Watts 1-1/2" LF909M1-QT-FS Reduced Pressure Zone (RPZ) Backflow Preventer Assembly is engineered to provide reliable cross-connection protection for high-hazard commercial, institutional, and industrial potable water supplies. Designed to prevent dangerous backpressure and backsiphonage, this assembly uses a compact, dual-check inline design with an integrated differential pressure relief valve and built-in flood sensor, helping protect your system from upstream or downstream pressure fluctuations.
Key Features
- High-Hazard Protection: Certified for health-hazard containment applications, helping prevent cross-contamination from entering the potable water supply.
- Quarter-Turn Shutoffs: Equipped with two quarter-turn ball valve shutoffs with lever handles and top-mounted test cocks for fast, straightforward field diagnostics.
- SentryPlus Alert Flood Sensor: Built-in sensor detects excessive water discharge from the relief valve, helping alert facility personnel before minor issues become costly flooding events. (Add-on connection kit required for BMS or cellular alert notifications.)
- Modular, Easy-Maintenance Design: Compact construction allows in-line servicing of checks and relief seats without removing the assembly from the pipeline — no special tools required.
| Specification Element | Mechanical Metric |
|---|---|
| Inlet / Outlet Size | 1-1/2" (40 mm) NPT Male Threaded |
| Maximum Working Pressure | 175 PSI (12.1 bar) |
| Fluid Operational Temp Range | 33°F to 140°F (0.5°C to 60°C) continuous; 180°F (82°C) intermittent |
| Main Body Material Construction | Lead Free Cast Copper Silicon Alloy |
| Shipping Weight | 40 lbs (18.1 kg) |
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Formal Purchase Orders (POs) and tax-exempt ordering are accepted for commercial contractors and institutional facilities.
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