Leyon FM UL Air Release Vacuum Breaker Valve Threaded Flanged with Throttling Air Control Device Sizes 1″ 2″ 3″ 4″ 6″

Threaded and flanged Air Release & Vacuum Breaker Valves with Throttling Air Control Device (sizes 1″-6″) automatically release pipeline air and prevent vacuum, protecting systems from pressure damage. Features include dual-function integration, compatibility with multiple connections, and controllable flow. Used in water supply, drainage, HVAC systems, especially effective in high-rise buildings and pump pipelines.