Skip to content

Wilkins Upper Relief Plunger 3/4–1 in XL (972-34)

Brand: Zurn Industries, LLC
Save 25%
$32.83
$24.62
SKU 972-34
In Stock (1)

Notify me when back in stock

OEM replacement upper relief plunger for Wilkins 975/975XL relief valve assemblies. Designed for 3/4–1 in (XL) installations, this factory-compatible plunger restores proper relief valve operation when the original component is worn, corroded, or damaged. Using the correct plunger helps the relief valve sense pressure changes and discharge excess pressure reliably, protecting potable water systems from backflow hazards.

  • Direct replacement for Wilkins 975 series and 975XL models in 3/4–1 in sizes; engineered to match OEM dimensions and fit.
  • XL sizing covers 3/4 in through 1 in assemblies to ensure correct seating, spring engagement, and valve response.
  • Does not include O-ring — replacement seals and O-rings are sold separately; inspect all seals when servicing the assembly.
  • Field-service friendly: remove cover, inspect springs and seats, replace plunger, and retest per manufacturer procedure.
  • Recommended for irrigation, commercial, and residential potable water backflow assemblies where timely repair restores code-compliant protection.

Order SKU 972-34 to keep your Wilkins relief valve operating correctly. Refer to the Wilkins repair guide or a certified service technician for installation and testing. When replacing the plunger, always replace worn seals and confirm proper relief valve set and leak-free operation before returning the system to service.

Reviews

Frequently Asked Questions

What models is this plunger compatible with?
Compatible with Wilkins 975 and 975XL series relief valves in 3/4–1 inch sizes. Confirm model before ordering.
Does this part include the O-ring and seals?
No. The plunger does not include O-rings or seals. Inspect and replace worn seals separately to ensure a reliable seal.
How do I replace the upper plunger safely?
Shut off water, relieve pressure, remove cover, inspect springs and seats, swap the plunger, then test per the manufacturer procedure.
Will this restore relief valve performance?
Yes; replacing a worn upper plunger restores proper sensing and discharge function when combined with fresh seals and correct reassembly.

Add a FREE Pair of Gloves to Your Order

Spend $35+ Add a FREE Pair of Gloves to Your Order Select Your Size