Product details:

The Wilkins 1-1/2-720A Pressure Vacuum Breaker is designed for installation on potable water lines to protect against back-siphon age of contaminated water into the potable water supply. Most commonly found on irrigation systems, the 720A is a bronze bodied valve with quarter turn, full port ball valves. The device is testable and shall be tested in compliance with your local code. Maximum working pressure is 150psi.