Xylem-Hoffman Specialty 401475 Water & Steam Vent Valve 1/8" NPT 50 PSI 508

The Xylem-Hoffman Specialty 401475 Water & Steam Vent Valve 1/8" NPT 50 PSI is a pressure-operated that is applied to relieve the trapped air and steam in hydronic heating systems, boilers, and similar HVAC systems. It is an automatic that opens when internal pressure or steam hits the pre-determined limit, and unwanted air and vapor can escape to ensure that fluid circulation and heat transfer remain normal. It is installed in high places in the piping to facilitate efficient operations of the system by minimizing air binding.