Zurn 34-950XL3 3/4" Lead-Free Double Check Backflow Preventer, Bronze, FNPT

The Zurn Wilkins 34-950XL3 is a 3/4" lead-free double check valve assembly with FNPT connections, approved for low health hazard protection. It features a bronze body. Rated to 175 psi and 33°F to 180°F. This model is certified lead-free for potable-water installations.

The Wilkins 950XL3 Double Check Backflow Assembly provides low hazard protection against backsiphonage and backpressure in potable water applications. The 950XL3 series offers the most compact and lightest bronze small backflow available on the market today. The design combines the robust time-tested construction of our 950XL/XL2 series with the innovative modular check EZSwap® design of our 350 series allowing for ease of repair and greater labor savings compared to all other brands.

Features

• Compact and shortest bronze small backflow valve on the market allowing for installation versatility
• All-bronze body ensures durability against the elements, with a Noryl®* check body and stainless-steel fasteners to resist corrosion over time.
• EZSWAP® modular check with top access speeds up repairs and replacements
• Test ports located on valve’s centerline make install and testing easy
• Interlocking connected checks provide ¼ turn to access and disassemble.
• Low-cost repair kits extend the lifespan at a significantly lower cost
• Lead Free* (0.25% max. weighted average lead content)
• ASSE Listed, UPC® Listed, Meets NSF/ANSI/CAN 61 & 372 requirements; Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California; Safe Drinking Water Act Compliant

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 downstream substance could be a health hazard, codes require a reduced pressure zone (RPZ) assembly or a detector 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 and C-UL Classified, the listings normally required for a backflow device on a fire sprinkler supply.

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: Double Check Backflow Preventer
• Size: 3/4"
• Connection: FNPT
• Body Material: Bronze
• Max Pressure (psi): 175
• Application: Domestic Water
• Backflow Protection: Both
• MPN: 34-950XL3
• Temperature: 33°F to 180°F
• Certifications: ASSE-1015, AWWA-C510, CSA-B64.5, C-UL, UL, USC, NSF-61, NSF-372, 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;C-UL Classified
• Field Testable: Yes
• Number of Test Cocks: 4
• Shutoff Valves: Quarter-Turn Ball
• Approved Orientation: Horizontal & Vertical