The Xylem-Hoffman Specialty 401446 62 vacuum breaker is a crucial component designed to prevent backflow and siphoning in plumbing and HVAC systems. This vacuum breaker is installed at key locations in the piping network, usually high points or at the top of risers. It breaks the vacuum and keeps fluid flow from reversing by allowing air to enter the system. #XylemHoffmanSpecialty ... https://www.partshnc.com/62-vacuum-breakr-34-for-xylem-hoffman-specialty-part-401446