Watts LFN9C-D 3/4 Lead-Free Dual Check Valve Backflow Preventer, Brass, NPT

The Watts LFN9C-D 3/4 is a 3/4" lead-free dual check valve with NPT connections, approved for low health hazard protection. It features a brass body and a rubber seat. Rated to 125 psi and 33°F to 140°F. This model is certified lead-free for potable-water installations.

This 3/4 inch lead free dual check vacuum breaker backflow preventer with atmospheric vent prevent high-hazard backsiphonage backflow and low-head backpressure (10 FT or less) from contaminating the potable water supply. It prevents backflow associated with hose connections when screwed directly to a sill cock, yard hydrant, or wall hydrant. It consists of a lead free brass body with two independently operating rubber and stainless steel check valves, with an atmospheric vent located between the them. It is in-line field testable, non-removable and designed for non-continuous pressure applications. It is ideal for installation in service sinks, chemical dispensers, sill cocks, and frost proof hydrants. Maximum working pressure is 125 psi (10.6 bar).

Features

• Lead free body construction
• Female hose thread inlet by male hose thread outlet
• Non-removable
• Hand sprayers

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.

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"
• Outlet Size: 3/4"
• Connection: NPT
• Body Material: Brass
• Seat / Seal Material: Rubber
• Max Pressure (psi): 125
• Application: Domestic Water
• Backflow Protection: Both
• Operation: Continuous
• Pack Quantity: 50
• Country of Origin: Mexico
• Warranty: 1 Year Limited
• MPN: LFN9C-D 3/4
• Temperature: 33°F to 140°F
• Certifications: CSA-B64
• Lead-Free: Yes
• Assembly Type: Dual Check
• Hazard Protection Level: Low Health Hazard
• 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