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Wilkins 972-33 No.1 Check Spring for 975XL (3/4-1")

Brand: Zurn Industries, LLC
Save 25%
$30.14
$22.60
SKU 972-33

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The Wilkins 972-33 No.1 Check Spring is a genuine replacement part designed for Wilkins 975XL and 975XL2 reduced-pressure backflow preventers. Sized for 3/4" to 1" models, this spring restores proper tension and seating for the first check assembly to maintain reliable backflow protection.

  • OEM part number 972-33 - No.1 (first) check spring for 975XL/975XL2.
  • Compatible with 3/4"-1" (0.75-1.00") 975XL series reduced-pressure assemblies.
  • Use when the No.1 check shows wear, loss of spring tension, or leakage.
  • Sold as the replacement spring only; does not include check disc, seats, or cover components.
  • Refer to manufacturer specification sheets, repair parts lists, and installation manuals for proper service procedures.
  • Genuine Wilkins replacement part helps maintain certification when repaired per manufacturer instructions.

Install this part following the manufacturer's installation and safety instructions. If you are unsure about compatibility or service procedures, consult the technical documents on the product page or a certified backflow technician.

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Frequently Asked Questions

What models is the 972-33 check spring compatible with?
Fits Wilkins 975XL and 975XL2 reduced-pressure backflow preventers sized 3/4" to 1".
How do I know when to replace the No.1 check spring?
Replace when the first check leaks, shows visible corrosion, or when testing indicates loss of spring tension or failed check performance.
Is this part sold as a complete repair kit?
No. The 972-33 is the No.1 check spring only. For a full service kit, choose the RK34-975XL repair kit with seals, springs, and o-rings.

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