The Watts 2 inch LF909M1-QT-HW is a lead-free Reduced Pressure Zone (RPZ) backflow preventer designed to safeguard potable water supplies from pollution in hot water applications. This assembly prevents backsiphonage and backpressure and features a durable lead-free cast copper silicon alloy body, stainless steel check modules, and quarter-turn ball valves. Its unique air-in/water-out design offers high relief valve discharge capacity during emergencies. The compact, modular design allows for easy installation in horizontal or vertical orientations and simplifies in-line maintenance, making it ideal for continuous pressure piping applications where health hazard protection is critical. Item number 0792035.
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Installation Recommendations
The 2 inch NPT male threaded body connection allows for direct installation into a corresponding 2 inch NPT female threaded pipe system.
Installation can be performed in either a horizontal or vertical (up or down) orientation.
When installing a drain line, an air gap fitting (such as a Model 909AG) is recommended to pipe the relief valve discharge to a safe location and prevent water damage.
The Watts 2 inch LF909M1-QT-HW Reduced Pressure Zone Assembly is a lead-free backflow preventer designed to protect potable water supplies from pollution caused by backsiphonage or backpressure, specifically in hot water applications. Its exclusive design incorporates a patented air-in and water-out principle for enhanced protection during emergency conditions.
This assembly features a robust lead-free bronze body and is recognized for its reliability and ease of service, featuring full-port, quarter-turn ball valves and stainless steel check seats designed for hot and harsh water conditions.
Features
Approved for hot water applications.
Lead-Free cast copper silicon alloy body with three covers.
Patented air-in and water-out principle provides high-capacity relief valve discharge.
Modular design facilitates easy maintenance and in-line repairs.
Replaceable seats for extended product life.
Compact design for installation ease.
Can be installed in horizontal or vertical (up or down) orientations.
Quarter-turn ball valves with lever handles on inlet and outlet.
Stainless steel check modules and seats for hot and harsh water conditions.
Top-mounted test cocks for easy testing.
No special tools are 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 and contact us with any questions before ordering.
Specifications
Size: 2 inch
Body Material: Lead Free Cast Copper Silicon Alloy
Check Cover Material: Celcon®
Check Valve Seats: Stainless Steel
Relief Valve Seats: Stainless Steel
Test Cocks Material: Lead Free Cast Copper Silicon Alloy
Shutoff Valves: Quarter-Turn Ball Valves
Max Working Pressure: 175 PSI (12.1 bar)
Temperature Range (Continuous): 33°F – 210°F (0.5°C – 99°C)
Installation Orientation: Horizontal or Vertical (Up or Down)
Connections
Body Connection: 2 inch NPT Male Threaded
Certificates & Approvals
AWWA C-511-92
FCCCHR or USC Manual Section 10
ASME (UPC), SBCCI (Standard Plumbing Code)
Tested and Certified by NSF International
Listed by IAPMO
Listed by SBCCI
Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California (for QT and S models)
CSA B64.4
UL Listed
FAQs
Is this backflow preventer suitable for hot water systems?
Yes, the Watts LF909M1-QT-HW model is specifically designed and approved for hot water applications, with a continuous operating temperature range of 33°F to 210°F (0.5°C to 99°C).
What does "Lead Free" mean for this device?
"Lead Free" means the device is constructed from lead-free cast copper silicon alloy and other lead-free materials in components that come into contact with potable water, complying with current regulations for safe drinking water.
Can this backflow preventer be installed in any orientation?
This Watts LF909M1-QT-HW backflow preventer can be installed in either a horizontal or a vertical (up or down) orientation, offering flexibility for various piping configurations.
What type of connections does the 2 inch LF909M1-QT-HW model use?
The 2 inch LF909M1-QT-HW model features a 2 inch NPT male threaded body connection, designed to interface with corresponding NPT female threaded piping.
What is included with the Watts LF909M1-QT-HW backflow preventer?
The assembly includes the lead-free bronze body, quarter-turn ball valve shutoffs, stainless steel check modules and seats, replaceable seats, and top-mounted test cocks.
