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Zurn Wilkins RK18-860XL repair kit: four lead-free 1/8-inch test cocks shown on white background with part number label

Zurn Wilkins RK18-860XL 1/8" Test Cock Repair Kit (4-Pack)

Brand: Zurn Industries, LLC
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$99.59
$74.69
SKU RK18-860XL

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The Zurn Wilkins RK18-860XL Test Cock Repair Kit provides four 1/8-inch resilient-seated ball test cocks designed for use as test ports on backflow preventers. Each precision-machined test cock allows attachment of differential pressure gauges for accurate testing, inspection, and routine maintenance. These replacement test cocks simplify service and help maintain reliable differential pressure readings during inspections.

  • Kit contents: Four 1/8" test cocks (RK18-860XL).
  • Compatibility: Fits 1/4"–1" backflow preventers; 1/8" MNPT x 1/4" FNPT connections.
  • Materials & standards: Lead-free, bronze construction; certified to NSF/ANSI 372 by IAPMO R&T.
  • Performance: Resilient-seated ball design for reliable sealing and easy operation during routine testing.
  • Warranty: 1-year limited manufacturer warranty.

Recommended for plumbers and service technicians, the RK18-860XL is a direct-replacement repair kit for Wilkins 860XL series ports and other compatible backflow models. Use these test cocks to replace worn ports, restore reliable leak-free performance, and ensure compliance with local low-lead regulations. Verify model compatibility before ordering; consult product documentation or manufacturer resources for installation details and service instructions.

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Frequently Asked Questions

What models are compatible with the RK18-860XL kit?
The RK18-860XL fits Wilkins 860XL series and most 1/4"–1" backflow preventers; verify model compatibility before ordering.
How are the test cocks certified for potable water use?
These test cocks are low-lead compliant and certified to NSF/ANSI 372 by IAPMO R&T for use in potable water systems.
Can I install the RK18-860XL myself during routine maintenance?
A qualified plumber or technician should perform installation; the cocks install with standard fittings and allow pressure gauge attachment.
Does the kit include a warranty and what does it cover?
Yes. The manufacturer provides a 1-year limited warranty covering defects in materials and workmanship under normal use.

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