3/4ft 720A Pressure Vacuum Breaker Assembly - Brass Backflow Guard

In this review the 3/4' 720A Pressure Vacuum Breaker Assembly is considered for homeowners, landscapers, and contractors who need a simple, code-conscious solution to prevent backflow and siphoning in outdoor lines. The bottom line: this compact brass unit is best for anyone who wants a durable anti-siphon device that is easy to install and compatible with most standard irrigation setups, with the single biggest reason to buy being its straightforward, threaded connection and solid brass construction that supports reliable outdoor use.

Key Features

• Compatibility: The 3/4' 720A fits most residential and commercial irrigation systems, garden sprinklers, hose bibs, and outdoor water lines for broad applicability.
• Backflow Protection: Designed as a pressure vacuum breaker, it prevents contaminated water from flowing back into the clean supply and helps meet plumbing code requirements.
• Durable Materials: Heavy-duty brass construction provides corrosion resistance and long service life in outdoor conditions.
• Pressure Rating: The unit supports up to MAX 400PSI, suitable for a wide range of municipal and private water pressures.
• Simple Installation: Threaded connection design enables quick mounting and hassle-free maintenance for DIYers and professionals alike.
• Versatile Use: Works for lawn irrigation, garden watering systems, pool refill lines, and commercial landscaping applications.

Who It's For

The 720A pressure vacuum breaker is ideal for homeowners installing or upgrading lawn irrigation heads, gardeners adding anti-siphon protection to outdoor faucets, and landscapers who need a reliable brass valve that fits standard plumbing. Its easy threaded hookup and compatibility with common piping make it practical for small commercial properties too.

Those who should look elsewhere include users who require integrated test cocks, complex backflow assemblies for high-risk industrial systems, or models rated for continuous submersion; this model is designed for above-piping installation and straightforward outdoor protection rather than specialty industrial installations.

Pros & Cons

Pros

• Sturdy brass body offers long-term corrosion resistance and outdoor durability.
• Universally compatible threaded design makes replacement or retrofit simple.
• Effective anti-siphon/backflow protection helps meet plumbing code requirements.
• High pressure capacity (MAX 400PSI) handles a wide range of use cases.

Cons

• Some customers reported mixed leak resistance under the top, so careful installation and periodic inspection are advised.
• Requires installation at least 12 in above the highest downstream outlet, which may limit placement in some setups.

Specifications

Model	720A Pressure Vacuum Breaker
Connection Size	3/4' (universal 1' connection compatibility noted)
Material	Solid brass, corrosion-resistant
Maximum Pressure	MAX 400PSI
Typical Applications	Lawn irrigation, garden sprinklers, pool refill lines, outdoor water lines
Installation Requirement	Install at least 12 in above highest downstream piping or outlet

Our Verdict

The 3/4' 720A Pressure Vacuum Breaker Assembly is a practical, value-oriented backflow solution for most residential and light commercial irrigation uses. Its solid brass construction, easy threaded installation, and code-minded anti-siphon protection make it a worthwhile purchase for anyone needing reliable outdoor backflow prevention, provided the installer follows the elevation requirement and checks for leaks at the top during setup.

Frequently Asked Questions

Can I use this on a garden hose connection?
Yes, it is compatible with common hose bibs and outdoor water lines using standard threaded connections.

How high must it be installed?
The valve should be installed at least 12 in above the highest downstream piping or outlet to operate correctly.

Is this unit suitable for commercial landscapes?
Yes, it fits many commercial irrigation systems, though it is intended for typical outdoor lines rather than specialized industrial backflow assemblies.