The Watts LF800M4FR 2 is a 2" lead-free pressure vacuum breaker with FNPT connections, approved for high health hazard protection. It features a bronze body and a silicone seat. Rated to 150 psi. This model is certified lead-free for potable-water installations.
This 2 inch lead free anti-siphon pressure vacuum breaker backflow preventer prevents the reverse flow of polluted water from entering into the potable water supply due to backsiphonage. It consists of a lead free bronze body construction silicone rubber check valve disc, plastic check valve seat, stainless steel springs, a bonnet with silicone rubber O-ring seal, a lightweight plastic disc float, lever handle shutoff, and test cocks for winterization draining. It is ideal in health hazard continuous pressure applications such as irrigation systems and industrial process water systems where the water enters the equipment at or below its flood rim. The maximum pressure is 150 psi (10.3 bar) and the minimum pressure is 15 psi (55 kPa).
Features
- Lead free construction
- Replaceable seat
- Female NPT inlet and outlet with quarter turn shutoffs
- Easy internal access
- Includes: Test Cocks
Common Questions
- What hazard level is this PVB approved for?
- It is rated for high health hazard (toxic) cross-connections, but only against backsiphonage. The assembly is listed to ASSE 1020.
- 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. 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.
- Will this protect against backpressure?
- No. A pressure vacuum breaker protects against backsiphonage only. It will not stop backflow caused by backpressure — a downstream pump, elevated piping or a boiler — which requires a double check or RPZ assembly.
- 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 must be installed vertically (upright), above the highest downstream outlet, per the installation instructions and its ASSE listing.
Specifications
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Type: PVB
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Size: 2"
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Inlet Size: 2"
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Outlet Size: 2"
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Connection: FNPT
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Body Material: Bronze
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Seat / Seal Material: Silicone
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Max Pressure (psi): 150
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Application: Domestic Water
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Backflow Protection: Backsiphonage
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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: LF800M4FR 2
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Certifications: ASSE-1020, USC, IAPMO
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Lead-Free: Yes
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Assembly Type: PVB
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Hazard Protection Level: High Health Hazard
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ASSE Standard: ASSE 1020
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USC FCCCHR Approved: Yes
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Field Testable: Yes
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Shutoff Valves: Quarter-Turn Ball
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Approved Orientation: Vertical
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Flood Sensor (SentryPlus Alert): No
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Strainer Included: No
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Air Gap Fitting Included: No
