Wilkins RK1-720APK | Model 720A Pressure Vacuum Breaker Repair Kit
Wilkins RK1-720APK | Model 720A Pressure Vacuum Breaker Repair Kit is backordered and will ship as soon as it is back in stock.
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Wilkins RK1-720APK | Model 720A Pressure Vacuum Breaker Repair Kit
The Wilkins RK1‑720APK Pro‑Kit is a targeted repair solution designed to restore proper sealing and operation in Model 720A Pressure Vacuum Breakers used in irrigation systems. It includes all critical internal components required to maintain compliance and extend service life.
Key Specifications:
| Compatible Sizes | ½", ¾", 1" |
| Kit Type | Internal component repair kit |
| Application | Irrigation backflow prevention systems |
| Components Included | O‑Ring Bonnet, Load Nut & Guide, Load Washer, Upper Disc, Poppet |
| Compatibility | Model 720A Pressure Vacuum Breaker only |
Features & Benefits:
- Complete Internal Component Set: Provides all five critical wear parts for comprehensive repair.
- Targeted Repair Solution: Specifically engineered for Model 720A devices in ½", ¾", and 1" sizes.
- Restores Proper Operation: Replaces worn sealing and moving parts to restore full backflow prevention capability.
- Cost‑Effective Maintenance: Extends the service life of existing assemblies without requiring full replacement.
Standards Compliance:
Compatible with Model 720A devices meeting ASSE 1020 standards; USC FCCCHR approved assemblies
What's Included:
- O‑Ring Bonnet
- Load Nut & Guide
- Load Washer
- Upper Disc
- Poppet
- Installation instructions
Comparison of Wilkins Repair Kits:
| Feature | RK1‑720APK (720A PVB) | RK34‑375 (375 Series) | RK1‑NR3XL (NR3XL Valve) |
|---|---|---|---|
| Capacity | Restores 720A assemblies (½"–1") | Complete rebuild for 375 Series backflow preventers | Repair kit for 1" NR3XL pressure reducing valves |
| Best For | Irrigation systems requiring backflow protection | Commercial/industrial backflow prevention assemblies | Residential/commercial pressure regulation systems |
| Key Components | Bonnet O‑Ring, Load Nut & Guide, Load Washer, Upper Disc, Poppet | Check assemblies, springs, seals, O‑rings | Spring, diaphragm, seals, O‑rings |
| Compliance | ASSE 1020, USC FCCCHR | ASSE 1013, USC FCCCHR | ANSI/ASSE 1003 |
How to Install the RK1‑720APK:
- Shut off water supply by closing inlet and outlet shut‑off valves.
- Remove canopy and bonnet from the 720A assembly.
- Bleed pressure by opening the No. 2 test cock.
- Disassemble internal components (disc & poppet assembly, spring, spider).
- Replace worn parts with the new RK1‑720APK kit components.
- Reassemble and tighten bonnet and canopy screws securely.
- Pressurize and test the assembly according to standard test procedures.
FAQ
Q: What Model 720A Sizes Is the Wilkins RK1‑720APK Compatible With?
A: The RK1‑720APK Pro‑Kit is designed for use with Model 720A Pressure Vacuum Breakers in ½", ¾", and 1" sizes. For example, it is compatible with the Wilkins ½" 720A Pressure Vacuum Breaker Assembly.
Q: What Components Are Included in This Repair Kit?
A: The kit includes five essential parts: O‑Ring Bonnet, Load Nut & Guide, Load Washer, Upper Disc, and Poppet.
Q: When Should I Use the RK1‑720APK Repair Kit?
A: Use this kit when your Model 720A Pressure Vacuum Breaker shows signs of leaking, reduced performance, or fails testing.
Q: What Systems Commonly Use the 720A and This Repair Kit?
A: The 720A is widely used in irrigation backflow prevention setups. Compatible systems include residential and commercial irrigation lines where backsiphonage protection is required.
Q: How Often Should the 720A Be Serviced?
A: Annual inspection and maintenance are required. Internal components should be replaced when wear is evident or if the device fails testing.
Q: Can the RK1‑720APK Be Installed Outdoors?
A: Yes, but the 720A assembly must be protected against freezing conditions. Follow drain procedures or remove internal components during winter.
Q: Is Professional Installation Required?
A: Yes. Backflow preventer repairs should be performed by licensed professionals to ensure compliance with plumbing codes and proper system protection.
Q: What Happens If I Exceed the Recommended Service Interval?
A: Using the cartridge beyond its recommended service interval can result in reduced performance, leaks, or failure to prevent backsiphonage. Timely replacement ensures compliance and safety.
NOTICE: Do not use with water that is unsafe or of unknown quality without adequate disinfection either before or after the system.
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The Zurn Wilkins RK1‑720A Pressure Vacuum Breaker Repair Kit and the RK1‑720APK provide OEM replacement parts for maintaining Wilkins Model 720A assemblies. These kits restore proper function by replacing worn internal components.
Key Installation Requirements:
- Shut off inlet and outlet valves before servicing
- Depressurize system by opening test cocks
- Install kit components in vertical orientation as designed
- Ensure accessibility for testing and servicing after installation
- Follow local codes and regulations for backflow prevention devices
Important Notes Before Installing:
- Repairs must be performed by qualified, licensed personnel
- Do not install where backpressure may occur — 720A is for backsiphonage protection only
- Provide drainage if installed indoors to handle air vent discharge
- Protect unit from freezing; remove internal components or drain system during winterization
- Annual inspection and testing are required to maintain compliance
- Use only genuine Zurn Wilkins parts to ensure certification and performance
Basic Repair Overview:
- Close inlet and outlet shut‑off valves
- Remove canopy screws and canopy
- Bleed pressure using test cock #2
- Unscrew bonnet and remove disc, poppet, spring, and spider assembly
- Clean all parts with fresh water; replace worn components with kit parts
- Reassemble unit and retest according to standard test procedures
For complete step‑by‑step instructions, download the official Zurn Wilkins 720A Installation & Maintenance Manual and the Repair Kits Guide.
Want to Order the RK1‑720A or RK1‑720APK Repair Kit?
