The Watts LF07S 2 is a 2" lead-free dual check valve with Union connections, approved for low health hazard protection. It features a brass body and a silicone seat. Rated to 175 psi. This model is certified lead-free for potable-water installations.
This 2" dual check valve backflow preventer is designed to prevent the reverse flow of polluted water from residential fire sprinkler systems from entering into the potable water supply. It consists of a bronze body, silicone seat disc, union seals and captured stainless steel springs. This valve is easy to maintain and service. The minimum working pressure is 10 psi (69 kPa). The maximum working pressure is 175 psi (12.06 bar).
Features
- Durable bronze body
- Valve offers low pressure drop
- Install horizontally or vertically
- Certified to meet ANSI/ASSE Standard 1024, UL Listed
Common Questions
- What hazard level is this Dual Check approved for?
- It is rated for low health hazard (non-toxic, "pollutant") cross-connections only. Where the substance downstream could be a health hazard, codes require a reduced pressure zone (RPZ) assembly instead. The assembly is listed to ASSE 1024.
- 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.
- Can this device be field tested?
- No. It has no test cocks and is not a testable assembly, so it cannot be certified by a backflow tester. Where a jurisdiction requires an annually tested device, specify a testable assembly (double check, RPZ, or PVB) instead.
- Is this listed for fire protection service?
- Yes — it is UL Classified, the listings normally required for a backflow device on a fire sprinkler supply.
- 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.
Specifications
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Type: Dual Check
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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: Union
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Body Material: Brass
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Seat / Seal Material: Silicone
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Max Pressure (psi): 175
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Application: Domestic Water
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Backflow Protection: Backpressure
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Operation: Continuous
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Pack Quantity: 6
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Country of Origin: United States
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Warranty: 1 Year Limited
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MPN: LF07S 2
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Certifications: ASSE-1024, UL
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Lead-Free: Yes
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Assembly Type: Dual Check
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Hazard Protection Level: Low Health Hazard
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ASSE Standard: ASSE 1024
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USC FCCCHR Approved: No
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Fire Protection Listing: UL Classified
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Field Testable: No
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Number of Test Cocks: 0
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Shutoff Valves: None
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Approved Orientation: Horizontal & 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
