1 in 720A Pressure Vacuum Breaker Assembly - Brass Anti-Siphon

Our review of the 1 in 720A Pressure Vacuum Breaker Assembly finds it a practical choice for homeowners and contractors who need reliable anti-siphon protection for outdoor water lines. The single biggest reason to consider this valve is its heavy-duty brass construction combined with universal 1 in compatibility, which makes it easy to fit into most irrigation, sprinkler, and pool refill setups while meeting plumbing code for backflow prevention. Installation is straightforward for a competent DIYer, and the valve delivers consistent water flow in normal use.

Key Features

• Solid brass construction: The corrosion-resistant brass body provides long-lasting outdoor durability and stands up to weather exposure without rapid degradation.
• 1 in universal connection: Fits most residential and commercial irrigation systems, garden sprinklers, hose bibs, and outdoor water lines for broad compatibility.
• Backflow and anti-siphon protection: Prevents contaminated water from flowing back into the clean supply and helps meet standard plumbing code requirements.
• High pressure rating: Rated up to MAX 400PSI, suitable for a wide range of irrigation and refill line pressures encountered in yard and commercial use.
• Threaded connection design: Simple threaded fittings make installation and maintenance straightforward with common plumbing tools.
• Compact design: The small footprint allows mounting above downstream piping where required without significant space demands.

Who It's For

This pressure vacuum breaker is aimed at homeowners, landscapers, and contractors who need a dependable anti-siphon device for lawn irrigation, garden watering systems, and pool refill lines. It is especially useful where a compact, code-compliant backflow prevention device is required and where brass durability is preferred for outdoor use.

Those who require integrated test ports, electronic sensing, or a factory-guaranteed leak-free seal in every installation may want to consider alternative backflow assemblies or a different model; several users reported mixed experiences with leak resistance under the top, so careful installation and sealing are recommended.

Pros & Cons

Pros

• Durable brass construction resists corrosion and suits outdoor installations.
• Universal 1 in connection simplifies replacement and retrofit work on standard lines.
• Supports up to MAX 400PSI, covering common residential and commercial pressures.
• Easy to install with threaded fittings; many users report quick setup and steady water flow.

Cons

• Some users have reported mixed leak resistance around the top, so careful installation and periodic inspection are advised.
• Not a full testable backflow assembly; professionals needing advanced features should choose a different model.

Specifications

Model	720A Pressure Vacuum Breaker
Connection size	1 in threaded
Material	Solid brass, corrosion-resistant
Max pressure	MAX 400PSI
Applications	Lawn irrigation, garden sprinklers, pool refill lines, outdoor water lines
Installation note	Install at least 12 in above highest downstream piping or outlet

Our Verdict

The 1 in 720A Pressure Vacuum Breaker Assembly is a good-value, practical backflow and anti-siphon valve for most residential and many commercial outdoor water needs. Its solid brass build, universal 1 in connection, and high pressure rating make it a reliable choice for irrigation and refill lines, though installers should watch for potential leaks at the top and follow correct mounting height and sealing practices.

Frequently Asked Questions

Where should this valve be mounted?
Install the valve at least 12 in above the highest point of downstream piping or outlet to maintain proper air gap and function.

Is the valve compatible with standard irrigation fittings?
Yes, the 1 in threaded connection is designed to fit most residential and commercial irrigation systems and hose bibs.

Does it require special maintenance?
Regular visual inspection and occasional resealing or tightening may be needed; some users reported mixed leak resistance so check the top area after installation.