Wilkins 375-6 Reduced Pressure Principle Backflow Preventer 175 Psi 6 Inches Ductile Iron Flanged

Product Description

The Wilkins 375-6 is a 6-inch Reduced Pressure Principle (RP) Backflow Preventer built from ductile iron with flanged end connections. It is designed for commercial and industrial water systems where preventing backflow and back-siphonage is critical. HVAC technicians, plumbers, and water system engineers rely on RP backflow preventers like this one to protect potable water supplies from contamination caused by back pressure or back-siphonage events. The 375-6 handles operating pressures up to 175 psi and is rated for water temperatures from 33 degrees Fahrenheit to 140 degrees Fahrenheit, making it suitable for a wide range of system conditions. The unit features a short lay-length design that makes it easier to fit into tight mechanical rooms and equipment spaces where standard assemblies might not work. The body and cover have no threads or taps, which eliminates common corrosion entry points and extends the service life of the assembly. A single access cover design reduces downtime during inspection and maintenance, which matters on job sites where system uptime is a priority. The fusion epoxy coating adds another layer of corrosion protection on the interior and exterior surfaces. This backflow preventer uses the Zurn Wilkins low head loss Compound Check design, which delivers reliable performance while minimizing pressure drop across the assembly. It supports horizontal and vertical installation orientations. NRS, OSY, and butterfly shut-off valve options are available, and the unit can be configured with flanged, grooved, or grooved-by-flanged end connections for installation flexibility. The 375-6 meets the requirements of ASSE 1013, AWWA C-511, and ANSI B16.42. It is FM Approved, UL Listed, NSF Certified, IAPMO Listed, CSA Certified, and Lead Law Compliant. These certifications make it acceptable for use on fire protection, municipal, and commercial plumbing systems where code compliance is required. The valve body is ductile iron with rubber disc material and stainless steel seat material for long-term sealing performance. Full port design maintains maximum flow capacity through the assembly.

• FM Approved, UL Listed, NSF Certified, IAPMO Listed, CSA Certified, and ASSE 1013 compliant for broad code acceptance
• Short lay-length and single access cover design reduce installation space requirements and maintenance downtime
• No threads or taps in body or cover, plus fusion epoxy coating, for superior corrosion resistance

Product Highlights

The Wilkins 375-6 delivers reliable backflow protection for 6-inch commercial and industrial water systems, combining multi-certification compliance with a corrosion-resistant ductile iron body and a low head loss compound check design built for long-term performance.

Product Information

Standard Information

• Brand: WILKINS
• Manufacturer Part Number: 375-6

Technical Specifications

• Valve Size: 6 inches
• Maximum Pressure: 175 psi
• Pressure Class: 150
• Maximum Temperature: 140 degrees Fahrenheit
• Minimum Temperature: 33 degrees Fahrenheit
• Material: Ductile Iron
• Valve Body Material: Ductile Iron
• Valve Disc Material: Rubber
• Valve Seat Material: Stainless Steel
• Coating: Fusion Epoxy
• End Connections: Flanged
• Valve Body Style: Inline
• Valve Port Opening: Full Port
• Valve Stem: Non-rising
• Valve Type: Reduced Pressure Principle Assembly
• Installation Type: Horizontal, Vertical
• Height: 39.5 inches
• Length: 49.3 inches
• Width: 23 inches
• Weight: 437.5 pounds
• ASSE Standard: ASSE 1013
• ANSI Standard: ANSI B16.42
• AWWA Standard: AWWA C-511
• FM Approved: Yes
• UL Listed: Yes
• NSF Certified: Yes
• IAPMO Listed: Yes
• CSA Certified: Yes
• Lead Law Compliant: Yes
• Collection: Model 375
• Recommended Valve Application: Water
• Number of Handles: Two Handle