3 LF909-DNRS-FS

Item Number: 88009314
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$15,710.16
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 3 inch
  • Weight: 277.0 lb
  • Lead Free: Yes
  • Body Material: Cast Iron
  • Coating: ArmorTek® Patented 3-Part Advanced Epoxy System
  • Shutoff Valves: Domestic Non-Rising Stem
  • Maximum Working Pressure: 175 PSI
  • Flood Sensor: SentryPlus Alert® Technology
  • Approvals: ASSE 1013, AWWA C511-92, CSA B64.4, UL, IAPMO, NSF

Description

The Watts 3 inch Series LF909 Reduced Pressure Zone Assembly is a lead-free backflow preventer designed for health hazard cross-connection control in potable water systems. It prevents backflow caused by backsiphonage or backpressure, ideal for continuous pressure applications. Featuring a cast iron body with ArmorTek® coating for corrosion resistance and domestic non-rising stem shutoff valves, this assembly ensures reliable operation. An integrated SentryPlus Alert® flood sensor detects excessive discharge, providing alerts when paired with an add-on connection kit. Max working pressure is 175 PSI. Item number 88009314.

Help Me Connect

Flood Sensor Connectivity

The integrated flood sensor is a passive component unless activated with an add-on connection kit. Once activated, the sensor can relay alerts for excessive water discharge.

  • BMS Compatibility: Connects with Building Management Systems (BMS) for integrated facility monitoring.
  • Cellular Communication: Supports cellular network communication for remote alerts.
  • Sensor Control Monitor: Integrates with the Sensor Control Monitor to deliver maintenance alerts to BAS via RS-485 Modbus or the Nexa® platform by Wi-Fi connectivity.
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Additional Details

The Watts Series LF909 Reduced Pressure Zone Assembly is a 3 inch lead free backflow preventer designed to provide cross-connection control protection for potable water supplies. It prevents the reverse flow of polluted water into the drinking water system due to both backsiphonage and backpressure.

This assembly is ideal for continuous pressure piping applications and at cross-connections identified as health hazards, including containment at the service line entrance.

Construction & Design

  • Features a cast iron body with ArmorTek® coating technology, a patented three-part advanced epoxy system engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrate.
  • Includes domestic non-rising stem (NRS) resilient seated gate valves for reliable shutoff.
  • Equipped with captured spring check valves, replaceable seats, and stainless steel internal parts for durability and easy maintenance.
  • The field reversible pressure differential relief valve features a unique "air-in/water-out" design, providing maximum discharge capacity during emergency conditions.

Flood Detection & Alerts

  • 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, the sensor is activated to relay alerts for potential flooding events to facility personnel.

Specifications

  • Product Type: Reduced Pressure Zone Backflow Preventer
  • Series: LF909
  • Nominal Size: 3 inch
  • Lead Free: Yes (wetted surface contains less than 0.25% lead by weight)
  • Body Material: Cast Iron
  • Coating: ArmorTek® Patented 3-Part Advanced Epoxy System
  • Shutoff Valves: Domestic Non-Rising Stem (NRS) Resilient Seated Gate Valves
  • Internal Parts Material: Stainless Steel
  • Seat Material: Stainless Steel
  • Test Cock Material: Lead Free* Copper Silicon Alloy
  • Maximum Working Pressure: 175 PSI (12.06 bar)
  • Continuous Operating Temperature: 33°F to 110°F (0.5°C to 43°C)
  • Intermittent Operating Temperature: 140°F (60°C)

Certificates & Approvals

  • ASSE Std. 1013
  • AWWA C511-92
  • CSA B64.4
  • UL Classified File No. EX3185
  • IAPMO (UPC)
  • Approved by Foundation for Cross-Connection Control and Hydraulic Research at USC
  • NSF Certified to NSF/ANSI 61-G

FAQs

What is a Reduced Pressure Zone (RPZ) backflow preventer assembly?

An RPZ assembly like the Watts LF909 is designed to protect potable water supplies from contamination by preventing reverse flow (backflow) due to backsiphonage or backpressure. It's used in health hazard cross-connections.

What does "Lead Free" mean for this backflow preventer?

"Lead Free" means that the wetted surfaces of this product, which contact consumable water, contain less than 0.25% lead by weight, complying with Lead Free installation requirements.

How does the ArmorTek® coating benefit this assembly?

ArmorTek® is a patented three-part advanced epoxy system applied to the cast iron body. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing the durability and lifespan of the backflow preventer.

How does the flood sensor work, and what do I need to activate it?

The flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. To activate its alert capabilities, an add-on connection kit is required. This kit enables communication with systems like BMS, cellular networks, or the Sensor Control Monitor.

What is the maximum operating pressure and temperature range for this LF909 assembly?

This 3-inch LF909 assembly has a maximum working pressure of 175 PSI (12.06 bar). It can operate continuously between 33°F to 110°F (0.5°C to 43°C) and intermittently up to 140°F (60°C).

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