3 LF009-OSY-S-FDA-FS
Item Number: F124317Brand - Watts
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- Nominal Pipe Size: 3 inch
- Body Material: Cast Iron with ArmorTek® Coating
- Shutoff Valves: UL and FM Approved OSY Gate Valves
- Strainer: FDA Epoxy Coated
- Flood Detection: SentryPlus Alert® Flood Sensor included
- Maximum Supply Pressure: 175 psi
- Continuous Water Temperature: 110°F
- Lead Free* Construction: Wetted surface < 0.25% lead by weight
Description
Description
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Flood Sensor Connection
The integrated flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. To activate its full alert capabilities and relay notifications to facility personnel, an add-on sensor connection kit is required (RP/IS-009). Without this kit, the sensor operates as a passive component without communication. Connection kit options include:
- Integration with Building Management Systems (BMS)
- Cellular communication
- Connection to a Sensor Control Monitor, enabling integration with Building Automation Systems (BAS) via RS-485 Modbus or the Nexa® platform through Wi-Fi.

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Additional Details
This 3 inch lead free reduced pressure zone backflow preventer assembly (LF009-OSY-S-FDA-FS) is engineered to protect potable water supplies from pollution due to backsiphonage or backpressure. It is ideal for continuous pressure piping applications and for cross-connections identified as health hazards.
The assembly features a robust cast iron body with advanced ArmorTek® coating and includes a flood sensor with SentryPlus Alert® technology for enhanced monitoring.
Features and Benefits
- Reduced Pressure Zone (RPZ) Assembly prevents polluted water from entering potable supply.
- Equipped with a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
- ArmorTek® coating technology, a patented 3-part advanced epoxy system, resists microbial-induced corrosion (MIC) and protects exposed metal substrate.
- Lead Free* construction ensures compliance with installation requirements. *The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.
- Includes an FDA epoxy coated strainer for added protection.
- Features UL and FM Approved OSY resilient seated gate valves for reliable shutoff.
- Single access cover and modular check construction facilitate easy maintenance.
- Top entry to all internals provides immediate accessibility.
- Captured springs ensure safe maintenance procedures.
- Internal relief valve reduces installation clearances.
- Replaceable seats allow for economical repair.
- Large body passages ensure low pressure drop.
- No special tools are required for servicing.
Specifications
- Product Type: Reduced Pressure Zone Backflow Preventer Assembly
- Series: LF009
- Nominal Pipe Size: 3 inch
- Body Material: Cast Iron
- Body Coating: ArmorTek® Powder Coating (internal and external surfaces)
- Strainer: FDA Epoxy Coated
- Lead Free: Yes (wetted surface < 0.25% lead by weight)
- Shutoff Valves: UL and FM Approved Outside Stem and Yoke (OSY) Resilient Seated Gate Valves
- Check Valves: Two in-line independent check valves
- Relief Valve: Internal pressure differential relief valve
- Test Cocks: Resilient seated, Lead Free* cast copper silicon alloy ball valve test cocks
- Flood Sensor: Yes, with SentryPlus Alert® technology
- Maximum Supply Pressure: 175 psi (12.1 bar)
- Continuous Water Temperature: 110°F (43°C)
- Intermittent Water Temperature: 140°F (60°C)
- Standards: USC
- ASSE Std. 1013
- AWWA C511
- CSA B64.4
- IAPMO File No. 1563
- Certifications:
- UL Classified
- FM Approved
FAQs
What is the primary purpose of the Watts LF009 Reduced Pressure Zone assembly?
What does "Lead Free*" mean for this product?
How does the flood sensor function, and what is needed to activate it?
What are the key maintenance advantages of this backflow preventer?
What types of shutoff valves are included with this 3-inch assembly?
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