Zurn Wilkins 34-720A 3/4ft 720A Pressure Vacuum Breaker Assembly

In this review the Zurn Wilkins 34-720A 3/4' 720A Pressure Vacuum Breaker Assembly is evaluated for residential and commercial irrigation use; its single biggest selling point is consistent, reliable protection against backsiphonage combined with installation-friendly features. Installers and DIYers will appreciate that the serial number is visible in any installed orientation and the test cocks are on the center line, which reduces time and fuss during setup. The review focuses on real-world durability, ease of installation, and how the product performs under typical irrigation pressures and seasonal conditions.

Key Features

• Visible serial number: The serial number is readable in any installed orientation, which reduces labor time during inspection and maintenance.
• Center-line test cocks: Test cocks located on the center line of the valve allow flexible installation positions and easier pressure testing.
• Approved check valve and vacuum relief: Includes an approved check and vacuum relief to provide consistent backsiphonage protection for irrigation and non-potable services.
• Durable construction: Cast bronze main valve body and stainless steel fasteners give corrosion resistance and added strength for long-term outdoor use.
• Wide operating range: Rated for a maximum pressure of 150 psi and usable between 33F and 110F to cover most irrigation scenarios.
• Certifications: Meets ASSE, IAPMO, and CSA listings and is approved by the Foundation for Cross-Connection Control and Hydraulic Research, supporting code compliance.

Who It's For

The 720A is best for homeowners, landscapers, and commercial facility maintenance crews who need dependable backsiphonage protection on irrigation or other non-potable systems. It suits users who want a robust, code-compliant assembly with straightforward installation and serviceability features like center-line test cocks and visible serial identification.

Those who should look elsewhere include projects requiring freeze-proof devices for severe winter climates below the rated temperature range or systems needing integrated electronic control; for extreme cold or special integration needs, a different device designed specifically for those conditions would be preferable.

Pros & Cons

Pros

• Reliable backsiphonage protection with an approved check and vacuum relief for safety and code compliance.
• Installation-friendly features such as center-line test cocks and an orientation-visible serial number reduce labor and simplify maintenance.
• Solid materials-cast bronze body and stainless fasteners-offer corrosion resistance and toughness for outdoor irrigation use.
• Clear pressure and temperature ratings make system planning straightforward for typical irrigation demands.

Cons

• Some users report mixed long-term durability, so occasional failures have been noted; regular inspection is recommended.
• Not designed for severe freezing conditions below the stated temperature range without additional winterization measures.

Specifications

Model	34-720A 3/4' 720A
Connection size	3/4' inlet/outlet
Maximum pressure	150 psi
Temperature range	33F to 110F
Main valve body	Cast Bronze ASTM B584
Fasteners	300 series Stainless Steel
Standards	ASSE Listed 1020, IAPMO Listed, CSA Certified

Our Verdict

The Zurn Wilkins 34-720A is a smart choice for irrigation and non-potable line protection where dependable backsiphonage prevention and easy servicing matter. Its robust materials, clear certifications, and installer-focused features deliver good value for both homeowners and professionals, provided the installation is winterized where needed and checked periodically for signs of wear.

Frequently Asked Questions

Is this assembly suitable for residential irrigation?
Yes. It is designed for residential and commercial irrigation and provides approved backsiphonage protection when installed per code.

What temperatures can it handle?
The device is rated for use between 33F and 110F; measures are needed for environments that experience prolonged freezing.

Does it require special maintenance?
Regular visual inspection and pressure testing via the center-line test cocks are recommended; the visible serial number helps during service and record keeping.