Watts LF007-QT-FZ 1/2 Lead-Free Double Check Backflow Preventer, Cast Iron, NPT

The Watts LF007-QT-FZ 1/2 is a 1/2" lead-free double check valve assembly with NPT connections, approved for low health hazard protection. It features a cast iron body and a rubber seat. Rated to 175 psi. This model is certified lead-free for potable-water installations.

This 1/2 inch lead free double check valve backflow preventer assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as non-health hazards and for contaminants at the service line entrance. This assembly consists of a lead free cast copper silicon alloy body construction, NPT end connections, quarter turn ball valve shutoffs, top mounted test cocks, two in-line independent positive seating check modules, captured springs, and replaceable check discs and seats. The double check valve includes a freeze sensor for use with SentryPlus Alert® technology to signal facility personnel when temperature nears and reaches the freezing point. Freeze alerts feature available with add-on connection kit for Wi-Fi networks, building management systems (BMS), irrigation management systems (IMS).

Features

• Includes a freeze sensor for use with SentryPlus Alert technology to signal facility personnel when temperature nears and reaches the freezing point
• Available freeze sensor connection kit to activate a monitoring system that trigger alerts for low and freezing temperatures
• Lead free construction
• Modular compact design
• Freeze alerts feature available with add-on connection kit for Wi-Fi networks, building management systems (BMS), and irrigation management systems (IMS)
• Replaceable seats and seat discs
• Top entry
• Includes: Test Cocks

Common Questions

What hazard level is this Double 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 1015.

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.

Does this assembly have to be tested every year?

Yes. This is a field-testable assembly with 4 test cocks. Most water authorities require it to be tested and certified by a licensed backflow tester at installation and annually thereafter. It carries USC FCCCHR approval, which many jurisdictions accept as their sole approval list.

What shutoff valves are included?

It is supplied with quarter-turn ball valves on the inlet and outlet.

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.

Specifications

• Type: Double Check
• Size: 1/2"
• Inlet Size: 1/2"
• Outlet Size: 1/2"
• Connection: NPT
• Body Material: Cast Iron
• Seat / Seal Material: Rubber
• Max Pressure (psi): 175
• Application: Domestic Water
• Backflow Protection: Both
• Operation: Continuous
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: LF007-QT-FZ 1/2
• Certifications: ASSE-1015, CSA-B64, UL, USC, IAPMO
• Lead-Free: Yes
• Assembly Type: Double Check
• Hazard Protection Level: Low Health Hazard
• ASSE Standard: ASSE 1015
• USC FCCCHR Approved: Yes
• Fire Protection Listing: UL Classified
• Field Testable: Yes
• Number of Test Cocks: 4
• Shutoff Valves: Quarter-Turn Ball
• Flood Sensor (SentryPlus Alert): No
• Strainer Included: No
• Air Gap Fitting Included: No