Watts LF7U3-3 1 1/4 X 1 1/4 Lead-Free Dual Check Valve Backflow Preventer, MNPT

The Watts LF7U3-3 1 1/4 X 1 1/4 is a 1-1/4" lead-free dual check valve with MNPT connections, approved for low health hazard protection. It features a buna-n seat. Rated to 150 psi. This model is certified lead-free for potable-water installations.

This 1 1/4 By 1 1/4" lead free dual check valve backflow preventer helps prevent the reverse flow of polluted water from entering into the drinking water supply at the service entrance or at individual outlets. It consists of a lead free cast copper silicon alloy body, with two plastic replaceable check valves, and stainless steel springs. The valve is designed for non-health hazard residential water system containment, continuous pressure applications. It is installed immediately downstream of the residential water meter, in a vertical or horizontal position. The minimum working pressure is 10 psi (69 kPa) and the maximum working pressure is 150 psi (10 bar).

Features

• Lead free construction
• Compact design
• Union connection
• Can be installed vertically or horizontally

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.

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

• Type: Dual Check
• Size: 1-1/4"
• Inlet Size: 1-1/4"
• Outlet Size: 1-1/4"
• Connection: MNPT
• Seat / Seal Material: Buna-N
• Max Pressure (psi): 150
• Application: Domestic Water
• Backflow Protection: Backpressure
• Operation: Continuous
• Pack Quantity: 12
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: LF7U3-3 1 1/4 X 1 1/4
• Certifications: ASSE-1024
• Lead-Free: Yes
• Assembly Type: Dual Check
• Hazard Protection Level: Low Health Hazard
• ASSE Standard: ASSE 1024
• USC FCCCHR Approved: No
• Field Testable: No
• Number of Test Cocks: 0
• Shutoff Valves: None
• Approved Orientation: Horizontal & Vertical
• Flood Sensor (SentryPlus Alert): No
• Strainer Included: No
• Air Gap Fitting Included: No