Zurn 212-375OSY 2-1/2" Lead-Free Backflow Preventer - Ductile Iron Reduced Pressure Principle Assembly

The Zurn Wilkins 212-375OSY is a 2-1/2" lead-free reduced pressure zone (RPZ) backflow preventer with Flanged connections, approved for high health hazard protection. It features a ductile iron body. Rated to 175 psi and up to 140°F. This model is certified lead-free for potable-water installations.

The 375 Reduced Pressure Principle Backflow Assembly is utilized where a potential high health hazard exists and is ideal for use when lead-free valves are required protecting against both backsiphonage and backpressure of contaminated water into the potable water supply. The 375 includes an epoxy-coated inside and out ductile iron valve body eliminating exposure to corrosion. With multiple options for NRS, OS&Y, and Butterfly shut-off valves, the 375 utilizes the Wilkins low headloss Compound Check and offers the lowest lifecycle costs on the market.

Features

• Short lay-length for small space installation
• NRS, OS&Y, or Butterfly shut-off valves available
• Available in flanged, grooved, or grooved X flanged end connections for installation versatility
• Ideal for any backflow replacement
• Utilizes Wilkins low headloss Compound Check for reliable and superior performance
• No threads or taps in body or cover, eliminating exposure to corrosion
• Single access cover reduces down time

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 outside screw and yoke (OS&Y) gate valves on the inlet and outlet. OS&Y gates give the visible open/shut indication that fire-line and many water-authority specs require.

Is this listed for fire protection service?

Yes -- it is UL Classified and C-UL Classified and FM Approved, the listings normally required for a backflow device on a fire sprinkler supply.

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 - Ductile Iron Reduced Pressure Principle Assembly
• Size: 2-1/2"
• Connection: Flanged
• Body Material: Ductile Iron
• Max Pressure (psi): 175
• Application: Domestic Water
• Backflow Protection: Both
• MPN: 212-375OSY
• Temperature: up to 140°F
• Certifications: ASSE-1013, AWWA-C511, AWWA-C606, CSA-B64.4, C-UL, UL, FM, 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
• Fire Protection Listing: UL Classified;C-UL Classified;FM Approved
• Field Testable: Yes
• Number of Test Cocks: 4
• Shutoff Valves: OSY Gate