Zurn 1-375XLS Lead-Free Backflow Preventer - Reduced Pressure Principle, Flanged

The Zurn Wilkins 1-375XLS is a 1" lead-free reduced pressure zone (RPZ) backflow preventer with Flanged connections, approved for high health hazard protection. It is rated to 175 psi and up to 180°F. This model is certified lead-free for potable-water installations.

The Wilkins 375XL Reduced Pressure Principle Backflow Preventer provides high hazard protection for potable water applications. The EZSwap™ Pressure Vessel is removed and replaced with the Flush Fitting Tool for faster flushing and testing.

Features

• 375XL (1/2"-2")
• EZSwap pressure vessel is removable for easy access and added convenience
• Durable, UV-resistant EZSwap Pressure Vessel resists corrosion and mineral build-up to better withstand harsh conditions
• Minimal bronze construction acts as theft deterrent
• Optional line flush tool provides easy line flushing, saving up to 15 minutes per installation and easier winterization.
• ASSE listed 1013 and cUPC listed
• CSA certified B64.4 and Meets the requirements of NSF/ANSI/CAN 61
• Safe Drinking Water Act compliant
• Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California

Common Questions

What hazard level is this RPZ approved for?

It is rated for high health hazard (toxic) cross-connections, so it may be used on either high or low hazard service. The assembly is listed to ASSE 1013.

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 non-rising stem (NRS) resilient-seated gate valves on the inlet and outlet.

Does the relief valve need a drain?

Yes. An RPZ relief valve is designed to discharge, and it can dump a large volume of water, so it must never be installed in a pit or below grade and the discharge must be piped to an adequate drain through an air gap. The air gap fitting is not included with this model and is ordered separately.

Specifications

• Type: Backflow Preventer - Reduced Pressure Principle
• Size: 1"
• Connection: Flanged
• Max Pressure (psi): 175
• Application: Domestic Water
• Backflow Protection: Both
• MPN: 1-375XLS
• Temperature: up to 180°F
• Certifications: ASSE-1013, AWWA-C511, CSA-B64.4, USC, NSF-61, NSF-372, IAPMO
• Lead-Free: Yes
• Assembly Type: RPZ
• Hazard Protection Level: High Health Hazard
• ASSE Standard: ASSE 1013
• USC FCCCHR Approved: Yes
• Field Testable: Yes
• Number of Test Cocks: 4
• Shutoff Valves: NRS Gate