2 1/2 LF009-OSY-FS

Item Number: F122643
1 1
$8,470.25
Limited Stock (3)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Watts
  • Size: 2 1/2 inch
  • Body Material: Cast Iron
  • Lead Free Construction: Yes
  • Shutoff Valves: UL and FM OSY Resilient Seated Gate
  • Corrosion Protection: ArmorTek® Advanced Coating
  • Flood Detection: SentryPlus Alert® Sensor
  • Maximum Operating Pressure: 175 PSI
  • Design: Compact, space-saving

Description

This 2 1/2 inch Watts LF009 Reduced Pressure Zone Backflow Preventer Assembly is designed to safeguard potable water supplies from pollution caused by backsiphonage or backpressure. Featuring a lead-free cast iron body with advanced ArmorTek® coating for superior corrosion resistance, it ensures long-lasting performance. The assembly includes UL and FM approved OSY gate valves and an integrated SentryPlus Alert® flood sensor for detecting relief valve discharge. Its compact design and robust construction make it ideal for health hazard cross-connections and continuous pressure applications. Item number F122643.

Help Me Connect

Flood Sensor Connectivity

  • The integrated SentryPlus Alert® flood sensor requires an add-on connection kit (sold separately) for activation and alert relay.
  • Connection kit options include compatibility with BMS (Building Management Systems) and cellular communication.
  • The Sensor Control Monitor connection kit enables integration with BAS (Building Automation Systems) via RS-485 Modbus or the Nexa® platform through Wi-Fi connectivity.
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Additional Details

This 2 1/2 inch lead free reduced pressure zone backflow preventer assembly is designed to protect potable water supplies by preventing the flow of polluted water from entering due to backsiphonage and/or backpressure. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards, as well as for contaminants at the service line entrance.

Construction & Components

  • Features a cast iron body with a patented ArmorTek® 3-part advanced epoxy coating system to limit both microbial induced (MIC) and exposed metal substrate corrosion.
  • Includes UL and FM Approved outside stem and yoke (OSY) resilient seated gate valves for reliable shutoff.
  • Equipped with top mounted test cocks, two in-line independent check valves, captured springs, and replaceable check seats.
  • An internal relief valve is designed for reduced installation clearances.

Advanced Flood Protection

  • Integrates a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
  • When paired with an add-on connection kit (sold separately), the sensor activates to relay alerts for potential flooding events, offering advanced monitoring capabilities.

Specifications

  • Size: 2 1/2 inch
  • Body Material: Cast Iron
  • Lead Free: Yes (contains less than 0.25% of lead by weight on wetted surfaces)
  • Type: Reduced Pressure Zone (RPZ) Backflow Preventer
  • Shutoff Valves: UL and FM Approved OSY Resilient Seated Gate Valves
  • Coating: ArmorTek® (3-part advanced epoxy system)
  • Flood Detection: SentryPlus Alert® Flood Sensor
  • Maximum Supply Pressure: 175 PSI (12.1 bar)
  • Continuous Water Temperature: 33°F - 110°F (0.5° - 43°C)
  • Intermittent Water Temperature: 33°F - 140°F (0.5° - 60°C)

Certifications & Standards

  • USC
  • ASSE Std. 1013
  • AWWA C511
  • CSA B64.4
  • IAPMO File No. 1563
  • UL Classified
  • FM Approved

FAQs

What is the primary purpose of this backflow preventer?

The primary purpose of this 2 1/2 inch Watts LF009 assembly is to prevent polluted water from flowing back into the potable water supply due to backsiphonage or backpressure. It is ideal for continuous pressure piping applications and at cross-connections identified as health hazards.

Is this product considered "lead free"?

Yes, this assembly is constructed with Lead Free materials, meaning the wetted surface of the product contacted by consumable water contains less than 0.25% of lead by weight, complying with Lead Free installation requirements.

How does the flood sensor work?

The assembly includes a SentryPlus Alert® flood sensor to detect excessive water discharges from the relief valve. To activate its alert relay features, an add-on connection kit (sold separately) is required to enable communication with other devices.

What kind of corrosion protection does this backflow preventer offer?

The cast iron body and internal components of the assembly are treated with ArmorTek®, a patented three-part advanced epoxy coating system. This technology is engineered to resist both microbial induced (MIC) and exposed metal substrate corrosion.

What are OSY resilient seated gate valves?

OSY stands for Outside Stem and Yoke. These are resilient seated gate valves that are UL Classified and FM Approved, ensuring reliable shutoff and compliance with fire safety standards. They allow for easy visual confirmation of valve position (open or closed).