Zurn - Vessel Assembly Repair Kit For 375 Series

The Zurn RK1-375V Vessel Assembly Repair Kit is engineered for restoring 1" 375 Series Reduced Pressure Principle Assemblies, including 375, 375XL, and 375ST models. This all-in-one kit includes both check modules, complete relief valve components, essential O-rings, and lubricant to streamline the repair process. Designed for compliance with lead-free laws, it ensures safe, code-compliant maintenance of potable water protection systems. Ideal for use in commercial and residential systems where protection against backsiphonage and backpressure is critical, the kit enables fast, thorough service with genuine factory parts.

Key Features:

• Compatible with Zurn 375, 375XL, and 375ST 1" RPZ assemblies
• Includes No. 1 and No. 2 check modules and complete relief valve components
• Contains all required O-rings and FDA-grade lubricant for reassembly
• Lead-free compliant for use in potable water systems
• Streamlined repair solution to restore full assembly function

Technical Specifications:

• Fits Valve Size: 1"
• Series Compatibility: 375, 375XL, 375ST
• Max Operating Pressure of Valve: 175 PSI
• Max Operating Temperature of Valve: 180°F
• Hydrostatic Test Pressure: 350 PSI
• Connection Type (of valve): Threaded FNPT ANSI B1.20.1
• Kit Part Number: RK1-375V
• Includes: (2) Check modules, (1) Relief valve cartridge, O-rings, lubricant

Installation & Application:

• Used for maintenance and repair of 1" Zurn Reduced Pressure Principle Assemblies
• Ideal for municipal, commercial, and residential backflow systems
• Ensure water supply safety by restoring valve performance to factory specifications
• Installation must follow Zurn’s service procedures for proper sealing and alignment

Compatibility & Optional Accessories:

• Compatible with 1" 375, 375XL, and 375ST RPZ backflow preventers
• Works with additional Zurn kits: RK1-375 (complete internals), RK1-375R (rubber parts only)
• Pairs with Zurn blow-out/flush fitting RK1-375BOF for winterization and debris flushing

Keep your backflow prevention systems code-compliant and operational with Zurn’s factory-tested RK1-375V repair kit. Perfect for contractors and maintenance teams needing reliable, fast repair solutions.