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Close-up of stainless steel canopy screw 721-11 (8-32 x 5/16), showing head profile and threading for Wilkins 720A replacement.

Wilkins 721-11 Canopy Screw for 720A Pressure Vacuum Breaker

Brand: Zurn Industries, LLC
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$27.02
$20.27
SKU 721-11

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Replacement canopy screw engineered for Wilkins/Zurn 720 and 720A pressure vacuum breaker assemblies. This OEM-fit stainless-steel screw (8-32 x 5/16) secures the canopy to the bonnet and is specified for the 1/2"–1" size range used in many irrigation systems. Designed for reliable corrosion resistance and long service life in outdoor, non-potable applications.

  • Compatibility: Fits Wilkins/Zurn 720 and 720A pressure vacuum breaker canopies, commonly used in irrigation.
  • Material & Size: Stainless steel fastener, thread size 8-32 and length 5/16 inch (filister-head bolt).
  • Function: Secures the plastic or metal canopy to the bonnet; sold as individual replacement screw.
  • Benefits: Corrosion-resistant construction reduces maintenance and ensures secure canopy retention.
  • Service Notes: Replace if threads or head are damaged; consult the manufacturer's repair parts and installation documents before servicing.

Includes one 721-11 canopy screw. For full service kits, repair parts lists, and installation instructions refer to the manufacturer's specification and repair documentation for the 720/720A series. If you need help confirming fitment for a specific valve size, our parts team can assist.

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Frequently Asked Questions

What size is the 721-11 canopy screw?
The 721-11 is an 8-32 x 5/16 stainless-steel screw used to secure Wilkins 720/720A canopies.
Which Wilkins models does this screw fit?
Compatible with Wilkins/Zurn 720 and 720A pressure vacuum breaker assemblies, commonly for 1/2"–1" sizes.
Can I use this screw in irrigation systems?
Yes. Stainless-steel construction resists corrosion in residential and commercial irrigation and backsiphonage systems.
How do I install or replace the canopy screw?
Remove the old screw, align the canopy on the bonnet, hand-start the 8-32 screw and snug until seated. Do not overtighten; follow manufacturer's service docs.

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