The T&S Brass B-0455-04 Vacuum Breaker Assembly is designed for reliable performance in plumbing applications. It features a 4" center mounting and a 1/2" NPT connection for easy installation. The assembly includes adjustable slip flanges, allowing for flexible positioning, and a set screw for precise height adjustment. This unit comes factory pre-assembled for convenience, ensuring a quick and hassle-free setup. Ideal for preventing backflow, it enhances safety and efficiency in your plumbing system.