Watts LFNLF9-HT 3/4 Lead-Free Dual Check Valve Backflow Preventer, FNPT

The Watts LFNLF9-HT 3/4 is a 3/4" lead-free dual check valve with FNPT connections, approved for low health hazard protection. It features a rubber seat. Rated to 150 psi and 33°F to 180°F. This model is certified lead-free for potable-water installations.

This 3/4 inch lead free dual check vacuum breaker backflow preventer prevents the reverse flow of polluted water from entering into the potable water supply. It is designed for non-health hazard continuous pressure applications, such as parlor sinks. It consists of a lead free body construction with an atmospheric vent and NPT female inlet and outlet connections.

Features

• Lead free construction
• Compact design
• Female NPT threads

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 1035.

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.

Specifications

• Type: Dual Check
• Size: 3/4"
• Inlet Size: 3/4"
• Connection: FNPT
• Seat / Seal Material: Rubber
• Max Pressure (psi): 150
• Application: Domestic Water
• Backflow Protection: Backpressure
• Operation: Continuous
• Pack Quantity: 50
• Country of Origin: Mexico
• Warranty: 1 Year Limited
• MPN: LFNLF9-HT 3/4
• Temperature: 33°F to 180°F
• Certifications: ASSE-1035, CSA-B64
• Lead-Free: Yes
• Assembly Type: Dual Check
• Hazard Protection Level: Low Health Hazard
• ASSE Standard: ASSE 1035
• USC FCCCHR Approved: No
• Field Testable: No
• Number of Test Cocks: 0
• Shutoff Valves: None
• Flood Sensor (SentryPlus Alert): No
• Strainer Included: No
• Air Gap Fitting Included: No