The Watts LF909-QT-S-HW 3/4 is a 3/4" lead-free reduced pressure zone (RPZ) backflow preventer, approved for high health hazard protection. It features a copper body. Rated to 175 psi and 33°F to 140°F. This model is certified lead-free for potable-water installations.
This 3/4 inch lead free reduced pressure zone backflow preventer assembly with its exclusive design incorporating the patented air-in and water-out principle for protection during an emergency condition prevents the flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance for in-line repairs. It can be installed horizontal or vertical without the need of any special tools. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and from contaminants found at the service line entrance. This assembly consists of a lead free bronze body, QT ball valve shutoffs with tee handles, a strainer, stainless steel check modules for hot and harsh water conditions, replaceable seats, top mounted test cocks, and a pressure differential relief valve.
Features
- Lead free bronze body construction for durability
- Unique patented air-in and water-out design provides high capacity relief valve discharge performance during emergency conditions
- Compact for easy installation
- Quarter turn ball valves with tee handles
- Horizontal or vertical (up or down) installation
- Includes: Test Cocks
- Includes: Strainer
Common Questions
- What hazard level is this RPZ approved for?
- It is rated for high health hazard (toxic) cross-connections, so it may be used on either high or low hazard service. The assembly is listed to ASSE 909 and ASSE 1013.
- Is this model legal for potable water?
- Yes. It is certified lead-free to NSF/ANSI 372, which is what state plumbing codes require for any device in a drinking-water line.
- Does this assembly have to be tested every year?
- Yes. This is a field-testable assembly with 4 test cocks. Most water authorities require it to be tested and certified by a licensed backflow tester at installation and annually thereafter. It carries USC FCCCHR approval, which many jurisdictions accept as their sole approval list.
- What shutoff valves are included?
- It is supplied with quarter-turn ball valves on the inlet and outlet.
- How does this have to be installed?
- It is approved for either horizontal or vertical installation, with the flow arrow on the body pointing in the direction of flow.
- Does the relief valve need a drain?
- Yes. An RPZ relief valve is designed to discharge, and it can dump a large volume of water, so it must never be installed in a pit or below grade and the discharge must be piped to an adequate drain through an air gap. The air gap fitting is not included with this model and is ordered separately.
Specifications
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Type: RPZ
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Size: 3/4"
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Inlet Size: 3/4"
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Outlet Size: 3/4"
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Body Material: Copper
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Max Pressure (psi): 175
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Application: Domestic Water
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Backflow Protection: Both
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Operation: Continuous
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Country of Origin: United States
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Warranty: 1 Year Limited
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MPN: LF909-QT-S-HW 3/4
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Temperature: 33°F to 140°F
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Certifications: ASSE-909, ASSE-1013, CSA-B64, USC, IAPMO
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Lead-Free: Yes
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Assembly Type: RPZ
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Hazard Protection Level: High Health Hazard
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ASSE Standard: ASSE 909;ASSE 1013
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USC FCCCHR Approved: Yes
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Field Testable: Yes
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Number of Test Cocks: 4
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Shutoff Valves: Quarter-Turn Ball
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Approved Orientation: Horizontal & Vertical
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Flood Sensor (SentryPlus Alert): No
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Strainer Included: Yes
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Air Gap Fitting Included: No
