Zurn 3-375A Reduced Pressure Zone Backflow Preventer

Product Description

The ZURN 3-375A is a reduced pressure zone (RPZ) backflow preventer designed to protect potable water supplies from contamination through back-siphonage and backpressure. This assembly incorporates a reduced pressure principle design with two independent check valves and a differential relief valve that maintains a lower pressure zone between the checks, ensuring contaminants cannot enter the supply line under fault conditions. At 3 inches in size, this unit is suited for commercial and industrial water systems where a high-hazard cross-connection control device is required by code. Licensed plumbers and backflow prevention specialists handle installation and annual testing.

The 3-375A fits applications in commercial buildings, irrigation systems, fire suppression supply lines, and industrial process water systems where local codes mandate a reduced pressure zone assembly for high-hazard service. It is installed on the main supply or branch lines where backflow testing access is required. The 3-inch size is typical for mid-to-large commercial installations with corresponding flow demands.

Key Features

• Reduced pressure zone design provides high-hazard cross-connection protection
• Dual independent check valves with intermediate relief valve for redundant protection
• 3-inch body size suited for commercial and industrial flow rates
• Designed for annual field testing per local plumbing and cross-connection control codes
• RPZ classification meets requirements for high-hazard backflow prevention applications

Compatibility

Designed as an OEM-style reduced pressure zone backflow preventer for 3-inch potable water supply, commercial irrigation, and industrial process piping systems requiring high-hazard cross-connection control.

Installation Notes

Installation must be performed by a licensed plumber or certified backflow prevention assembly tester in accordance with local plumbing codes and IPC requirements. Shut off the upstream water supply completely before installation or service. The assembly must be installed in the correct flow direction as indicated on the body, and adequate clearance must be provided below the relief valve discharge port per code. Annual testing and certification by a qualified tester is required in most jurisdictions.

Technical Specifications

• Connection Size: 3 inches
• Device Type: Reduced Pressure Zone (RPZ) Backflow Preventer

Standard Information

• Brand: ZURN
• Manufacturer Part Number: 3-375A