1 1/4 LF009M2-QT-FS

Item Number: 88004113
1 1
$2,012.46
Limited Stock (2)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Watts
  • Size: 1 1/4 inch
  • Weight: 16.5 lb
  • Body Material: Lead Free copper silicon alloy
  • Connections: NPT inlet and outlet
  • Maximum Operating Pressure: 175 PSI
  • Temperature Range: 33°F - 180°F
  • Shutoff Valves: Quarter turn ball valves with tee handles
  • Flood Sensor: SentryPlus Alert technology included
  • Certifications: ASSE Std. 1013, AWWA C511, CSA B64.4

Description

The Watts 1 1/4 inch LF009M2-QT-FS Lead Free Reduced Pressure Zone Backflow Preventer Assembly protects potable water from pollution due to backsiphonage or backpressure. This durable assembly features a lead free copper silicon alloy body with 1 1/4 inch NPT connections and quarter-turn shutoff valves. It includes an internal relief valve and replaceable check seats for easy maintenance. An integrated SentryPlus Alert flood sensor detects excessive water discharge from the relief valve, requiring an add-on connection kit for activation and alert functionality. With a maximum operating pressure of 175 PSI and a temperature range of 33°F to 180°F, it meets ASSE Std. 1013 and CSA B64.4.

Help Me Connect

This Watts LF009M2-QT-FS backflow preventer features 1 1/4 inch NPT inlet and outlet connections, ensuring compatibility with standard threaded piping systems of the same size. The assembly is designed for in-line installation in potable water supply lines.

Flood Sensor Connectivity

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

This 1 1/4 inch Watts LF009M2-QT-FS Lead Free Reduced Pressure Zone Backflow Preventer Assembly is engineered to safeguard potable water supplies from contamination caused by backsiphonage or backpressure, adhering to national plumbing codes and water authority mandates.

Its compact and modular design ensures straightforward in-line maintenance and repair through a single access cover.

Features

  • Equipped with a flood sensor featuring SentryPlus Alert technology to detect continuous discharge from the relief valve.
  • Offers an internal relief valve design for reduced installation clearances.
  • Includes quarter-turn full port resilient seated ball valve shutoffs with tee handles for isolation.
  • Features two in-line independent check valves with captured springs.
  • Replaceable check seats and removable relief valve seats for economical repair.
  • Single access cover and modular check construction for ease of maintenance.
  • Top entry to all internals for immediate accessibility.
  • Captured springs for safe maintenance.
  • Large body passages provide low pressure drop.
  • Compact, space-saving design.
  • No special tools required for servicing.

Construction & Materials

  • Lead Free* cast copper silicon alloy body construction.
  • NPT inlet and outlet connections.
  • Silicone rubber disc material in the first and second check plus the relief valve.
  • Replaceable polymer check seats for both checks.
  • Stainless steel cover bolts.
  • The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

Flood Sensor Technology

  • Flood alerts are activated with an add-on sensor connection kit.
  • Compatible with BMS and cellular communication.
  • The Sensor Control Monitor allows integration with BAS via RS‑485 Modbus or the Nexa platform through Wi-Fi.

An add-on connection kit is required to activate the flood sensor. Without the connection kit, the sensor functions as a passive component with no communication capabilities.

Specifications

  • Product Type: Reduced Pressure Zone Backflow Preventer Assembly
  • SKU: 88004113
  • Brand: Watts
  • Size: 1 1/4 inch
  • Body Material: Lead Free cast copper silicon alloy
  • Inlet Connection: 1 1/4 inch NPT
  • Outlet Connection: 1 1/4 inch NPT
  • Shutoff Valves: Quarter turn full port resilient seated ball valves with tee handles
  • Check Valves: Two in-line independent
  • Relief Valve: Internal pressure differential
  • Flood Sensor: Yes, SentryPlus Alert technology (requires add-on kit for activation)
  • Disc Material: Silicone rubber (check valves and relief valve)
  • Seat Material: Replaceable polymer (check valves), removable (relief valve)
  • Cover Bolts: Stainless steel
  • Maximum Supply Pressure: 175 PSI (12.1 bar)
  • Temperature Range: 33°F - 180°F (0.5° - 82°C)
  • Lead Content: Wetted surface contains less than 0.25% lead

Dimensions (Approximate)

  • Overall Length (A): 17 3/8 inches (441 mm)
  • Height (B): 6 3/4 inches (169 mm)
  • Width (C): 3 1/2 inches (89 mm)
  • Distance Between Shutoffs (L): 11 3/8 inches (289 mm)
  • Weight: 15 lbs (6 kg)

Certificates & Approvals

  • USC
  • ASSE Std. 1013
  • AWWA C511
  • CSA B64.4
  • IAPMO File No. 1563
  • Approved by Foundation for Cross-Connection Control and Hydraulic Research

FAQs

What is the primary function of the Watts LF009M2-QT-FS backflow preventer?

This reduced pressure zone assembly is designed to protect potable water supplies from contamination by preventing reverse flow (backsiphonage or backpressure) of polluted water. It complies with national plumbing codes and water authority requirements.

What material is the body of this backflow preventer made from?

The body is constructed from Lead Free cast copper silicon alloy. The wetted surface of the product contains less than 0.25% lead, ensuring compliance with Lead Free installation requirements.

Are shutoff valves included with this backflow preventer assembly?

Yes, this assembly is furnished with quarter-turn full port resilient seated ball valve shutoffs. These valves feature tee handles for easy operation and isolation.

How does the SentryPlus Alert flood sensor function?

The integrated SentryPlus Alert flood sensor detects excessive water discharges from the relief valve, signaling potential flooding events. Please note that an add-on connection kit (sold separately) is required to activate the sensor's alert capabilities.

What are the maximum operating pressure and temperature ratings for this model?

This backflow preventer is suitable for supply pressures up to 175 PSI (12.1 bar). It can handle water temperatures ranging from 33°F to 180°F (0.5° to 82°C).

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