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Wilkins 375 Complete Repair Kit 1"

Wilkins RK1-375 Complete Repair Kit for 1" 375 Series Backflow

Brand: Zurn Industries, LLC
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$250.76
$188.07
SKU RK1-375

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The Wilkins RK1-375 complete repair kit (Zurn/Wilkins) supplies all internal components needed to restore a 1" 375 series backflow assembly to factory performance. Designed for irrigation and potable water protection systems, this kit streamlines maintenance for technicians and service teams by bundling genuine replacement check modules, relief valve components, O-rings, and lubricant into a single part.

  • Compatibility: Fits 1" Wilkins/Zurn 375, 375XL, and 375ST reduced-pressure and double-check style assemblies.
  • Complete contents: No. 1 and No. 2 check modules, full relief valve components (stem, spring, seats, seals), all required O-rings, and factory-grade lubricant for reassembly.
  • Performance restoration: Replaces worn internal parts to restore proper sealing, pressure regulation, and check operation—reducing leaks and ensuring reliable backflow protection.
  • Materials & compliance: Rubber and steel internal components; lead-free compliant for potable water applications where required.
  • Operating limits: Designed for typical residential and commercial service up to 175 PSI and temperatures up to 180°F (refer to valve nameplate and manufacturer datasheet for exact limits).
  • Certifications & standards: Matches manufacturer specifications and is supplied as genuine Wilkins/Zurn repair parts; commonly listed to ASSE/IAPMO/CSA standards where applicable.

This repair kit is intended for qualified service technicians. Use the kit with the manufacturer’s installation and maintenance instructions and consult local codes when servicing backflow preventers. Replacing internal seals and check modules at recommended service intervals helps maintain system performance and extends the life of the assembly. If unsure about compatibility with your existing valve, verify the valve model and size before ordering.

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Frequently Asked Questions

What models does the RK1-375 repair kit fit?
Fits 1" Wilkins/Zurn 375, 375XL, and 375ST backflow assemblies; verify valve size before ordering.
What parts are included in this kit?
Includes No.1 and No.2 check modules, relief valve components, all O-rings, and lubricant for reassembly.
How often should I service a 375 backflow preventer?
Inspect annually and replace rubber or worn parts as needed; follow local codes and the manufacturer maintenance instructions.

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