Verified model passport / Zurn Wilkins
720A
Pressure vacuum breaker
The 720A looks like one device family, but Zurn separates its repair-kit path at the 1 inch / 1 1/4 inch boundary. Confirm the body size first, then choose complete internal or bonnet service.
Zurn positions the 720A for irrigation backflow protection. A correct kit does not resolve freeze-cracked bodies, incorrect installation height, or local testing and reporting requirements.
Compatibility workstation
Match the size and repair scope.
Use the complete model label, nominal body size, and failed component. The tool only exposes combinations found in the cited manufacturer material.
Published references are listed below. Choose a size band to narrow the list.
Complete repair kit
Bonnet washer and O-ring, load nut and guide, load washer, upper disc, poppet, spring, spider screw, lower disc, guide spider, and hex nut.
Repair Pro-Kit
Bonnet O-ring, load nut and guide, load washer, upper disc, and poppet.
Bonnet repair kit
Canopy screws, canopy, bonnet, bonnet washer, and bonnet O-ring.
Complete repair kit
Bonnet washer and O-ring, load nut and guide, load washer, upper disc, poppet, spring, spider screw, lower disc, guide spider, and hex nut.
Bonnet repair kit
Canopy, bonnet, bonnet washer, bonnet O-ring, and related canopy hardware listed in the manufacturer repair-kit guide.
Identity check
Confirm this model before ordering.
Similar-looking assemblies can use different internals. A search result or pipe size alone is not enough.
- 01
Confirm the body label reads 720A; do not apply these parts to an unmarked look-alike or a different Wilkins PVB.
- 02
The published complete-kit boundary changes after 1 inch: RK1-720A is for 1/2–1 inch, while RK2-720A is for 1 1/4–2 inch assemblies.
- 03
A bonnet repair kit and a complete internal repair kit address different scopes; do not use a bonnet kit to assume the check and internal parts are serviceable.
Before return to service
A matching kit is not a passed assembly.
Stop for body damage. Cracks, distortion, severe corrosion, or freeze damage can move the job from internal service to replacement.
Test after repair. Where the assembly is regulated, the governing utility or authority decides tester approval, reporting, and deadlines.
Use the current instructions. Part references can change. Confirm availability and supersession with the manufacturer or an authorized supplier.
Find the governing utilityOfficial source ledger
Trace every compatibility claim.
No retailer copy is used as the authority for the kit map.
- 01ZurnZurn Wilkins 720A pressure vacuum breaker product recordVerified 2026-08-02
- 02ZurnRK1-720A complete repair kit: 1/2, 3/4, and 1 inchVerified 2026-08-02
- 03ZurnZurn Wilkins Repair Kits Guide: Model 720A 1 1/4–2 inchVerified 2026-08-02