Watts LF8FR 3/4 Lead-Free Anti-Siphon Vacuum Breaker, NPT

The Watts LF8FR 3/4 is a 3/4" lead-free anti-siphon (atmospheric) vacuum breaker with NPT connections, approved for high health hazard protection. It features a rubber seat. Rated to 125 psi and 33°F to 180°F. This model is certified lead-free for potable-water installations.

This 3/4 inch lead free hose connection vacuum breaker backflow preventer is designed to prevent the flow of contaminated water back into the potable water supply and is specially made to permit the attachment of portable hoses to hose thread faucets. It provides protection against backsiphonage for health hazard installations requiring non-continuous pressure. This vacuum breaker backflow preventer has a freeze relief feature that protects the valve from freeze damage. It attaches to a sill cock with a 3/4 inch female hose thread by 3/4 inch male hose thread connection. The maximum pressure is 125 psi and maximum temperature is 180 degrees F.

Features

• Lead Free construction
• Easy to install
• Break away set screw
• No special tools required for servicing

Common Questions

What hazard level is this AVB approved for?

It is rated for high health hazard (toxic) cross-connections, but only against backsiphonage. The assembly is listed to ASSE 1011.

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.

Will this protect against backpressure?

No. An anti-siphon (atmospheric) 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. It also may not be used under continuous pressure: the supply downstream of it must not stay pressurized for more than 12 hours in any 24-hour period.

Specifications

• Type: AVB
• Size: 3/4"
• Inlet Size: 3/4"
• Outlet Size: 3/4"
• Connection: NPT
• Seat / Seal Material: Rubber
• Max Pressure (psi): 125
• Application: Domestic Water
• Backflow Protection: Backsiphonage
• Operation: Non-Continuous
• Pack Quantity: 50
• Country of Origin: Mexico
• Warranty: 1 Year Limited
• MPN: LF8FR 3/4
• Temperature: 33°F to 180°F
• Certifications: ASSE-1011, ANSI-A112.1.3, IAPMO
• Lead-Free: Yes
• Assembly Type: AVB
• Hazard Protection Level: High Health Hazard
• ASSE Standard: ASSE 1011
• 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