Watts 3/4" LF909-QT-HW Hot Water Device

Item Number: 0792031
1 1
$3,772.50
Limited Stock (1)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Watts
  • 3/4 inch Reduced Pressure Zone (RPZ) Assembly
  • Weight: 15.7 lb
  • Lead Free* cast copper silicon alloy body
  • Approved for hot water applications up to 210°F
  • Maximum Working Pressure: 175 psi
  • Quarter-turn ball valves with tee handles
  • Stainless steel check modules and relief valve seats
  • Integrated flood sensor on relief valve
  • Modular, compact design for easy installation and service

Description

The Watts 3/4" LF909-QT-HW is a Lead Free Reduced Pressure Zone (RPZ) backflow preventer assembly, specifically engineered for hot water applications up to 210°F. This 3/4 inch device protects potable water supplies from contamination caused by backsiphonage and backpressure, meeting national plumbing codes. It features a durable cast copper silicon alloy body, stainless steel check modules, quarter-turn ball valves with tee handles, and an integrated flood sensor on the relief valve. Its modular, compact design allows for easy installation in horizontal or vertical orientations and simplifies maintenance without special tools. Item number 0792031.

Help Me Connect

Connections

  • The Watts 3/4" LF909-QT-HW backflow preventer features 3/4 inch NPT female threaded body connections on both the inlet and outlet, allowing for direct attachment to corresponding 3/4 inch NPT male threaded pipes.

Drainage and Flood Sensor

  • The installation of a drain line is recommended for the relief valve to manage any discharge. When installing a drain line, an air gap is necessary to prevent potential backflow into the drain system.
  • The integrated flood sensor on the relief valve detects excessive water discharges. To activate flood alert features, an add-on sensor connection kit is required. Without this kit, the sensor is a passive component and does not communicate with other devices.
View full details

Additional Details

The Watts 3/4" LF909-QT-HW Reduced Pressure Zone Assembly is a specialized backflow preventer designed to protect potable water supplies from hazardous cross-connections, particularly in hot water applications.

This assembly prevents polluted water from entering the potable water supply due to backsiphonage and backpressure, ensuring compliance with national plumbing codes.

Key Features

  • Exclusive patented air-in and water-out principle for high capacity relief valve discharge during emergency conditions.
  • Modular, compact design eases installation and facilitates in-line maintenance.
  • Can be installed in horizontal or vertical (up or down) orientations.
  • Features quarter-turn ball valves with tee handles on both inlet and outlet.
  • Equipped with stainless steel check modules for hot and harsh water conditions.
  • Relief valve includes an integrated flood sensor for detecting excessive water discharges.
  • Flood alert functionality is activated via an add-on sensor connection kit, compatible with BMS and cellular communication.
  • Replaceable seats and top-mounted test cocks.
  • No special tools required for servicing.

This is a non-stock, special order item and could take up to 2 weeks or more to deliver. All non-stock items are non-refundable. Please be sure you order carefully. If you have ANY questions, please contact us before ordering.

Specifications

General

  • Brand: Watts
  • Model: LF909-QT-HW
  • Size: 3/4 inch
  • Assembly Type: Reduced Pressure Zone (RPZ)
  • Shutoff Valves: Quarter-turn ball valves with tee handles
  • Relief Valve: Pressure differential with flood sensor
  • Check Modules: Stainless Steel
  • Installation Orientation: Horizontal or vertical (up or down)

Materials

  • Body Material: Lead Free* cast copper silicon alloy
  • Check Seats: Stainless Steel 909
  • Relief Valve Seats: Stainless Steel 909
  • Test Tocks: Lead Free* cast copper silicon alloy

Performance

  • Temperature Range: 33°F - 210°F (0.5°C – 99°C)
  • Maximum Working Pressure: 175 psi (12.1 bar)

Connections

  • Inlet/Outlet Connection: 3/4 inch NPT Female threaded body connection

Certificates & Approvals

  • AWWA C-511-92
  • FCCCHR of USC Manual Section 10
  • IAPMO (UPC) Listed
  • SBCCI (Standard Plumbing code) Listed
  • Tested and Certified by NSF International
  • ASSE 1013
  • CSA B64.4
  • Approved by Foundation for Cross-Connection Control and Hydraulic Research at USC

FAQs

What is the primary use of the Watts 3/4" LF909-QT-HW?

This device is a Reduced Pressure Zone (RPZ) backflow preventer assembly designed to protect potable water supplies from pollution due to backsiphonage and backpressure, especially in hot water applications.

What are the temperature and pressure limits for this backflow preventer?

The Watts LF909-QT-HW is approved for continuous operation within a temperature range of 33°F to 210°F (0.5°C to 99°C) and has a maximum working pressure of 175 psi (12.1 bar).

Does this model come with an integrated flood sensor?

Yes, the relief valve includes an integrated flood sensor to detect excessive water discharges. However, an add-on sensor connection kit is required to activate flood alert features and enable communication with other devices.

What type of connections does the Watts 3/4" LF909-QT-HW use?

This backflow preventer features 3/4 inch NPT female threaded body connections on both the inlet and outlet for secure attachment to corresponding male threaded pipes.

Can this assembly be installed in any orientation?

Yes, the Watts LF909-QT-HW can be installed in either horizontal or vertical (up or down) orientations, providing flexibility for various plumbing setups.

Related Products

1 2