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Wilkins 3/4-1" 975 Air Gap

Zurn Wilkins AG-4 Air Gap Adapter for 3/4–1" 975

Brand: Zurn Industries, LLC
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$226.94
$170.21
SKU AG-4

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The Zurn Wilkins AG-4 air gap adapter provides a safe, code-compliant drain connection for Reduced Pressure Principle (RP) backflow preventers. Designed for indoor installations, the AG-4 directs nuisance discharge away from the assembly and eliminates a potential cross-connection to the potable water supply.

  • Compatible with Model 975XL and 975XL2 backflow preventers; fits 3/4"–1" inlet sizes with a 1" NPT outlet.
  • Durable epoxy-painted cast gray iron elbow with zinc-plated steel bolts for long-lasting corrosion resistance.
  • Meets ANSI/ASME A112.1.2 for air gap devices and plumbing cross-connection prevention.
  • Mounts to the body of the drain line and accepts standard piping materials for straightforward installation.
  • Compact 5" overall length and approximately 3-1/4" outer diameter to fit common RP assemblies.

Sold under part number AG-4, this adapter simplifies attaching a drain line to Model 975 series assemblies while preserving the required physical air gap. Use the AG-4 to protect potable water systems and reduce maintenance downtime when routing nuisance discharge to a safe drain.

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Frequently Asked Questions

What models is the AG-4 compatible with?
The AG-4 fits Zurn Wilkins Model 975XL and 975XL2 Reduced Pressure assemblies for 3/4"–1" inlet sizes with a 1" NPT outlet.
What material and finish does the AG-4 use?
The adapter features an epoxy-painted cast gray iron elbow and zinc-plated steel bolts for corrosion resistance.
How is the AG-4 installed and used?
Mount the AG-4 to the drain line body of the RP assembly to provide a physical air gap and route nuisance discharge to a safe drain.

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