Zurn 3-475V Lead-Free Reduced Pressure Backflow Preventer, Ductile Iron, Flanged

The Zurn Wilkins 3-475V is a 3" 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.

Reduced pressure backflow preventer 475V provides high hazard protection for portable applications. This backflow regulator is shaped in the z-Pattern, is installed in a vertical orientation, flow up and with butterfly valves provides high hazard protection for portable applications. Water backflow preventer has small footprint for easy retrofits and utilizes the patented, centre-stem guided compound check for reliable and superior performance.

Features

• 475V allows for RP protection in a vertical upward flow
• 475 "N" pattern provides very small footprint
• Wilkins Compound Check for low headloss
• Low-lead law compliant

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.

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.

How does this have to be installed?

It must be installed vertically (upright), above the highest downstream outlet, per its installation instructions and ASSE listing.

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: Reduced Pressure Backflow Preventer
• Size: 3"
• Connection: Flanged
• Body Material: Ductile Iron
• Max Pressure (psi): 175
• Application: Domestic Water
• Backflow Protection: Both
• MPN: 3-475V
• 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: NRS Gate
• Approved Orientation: Vertical