Resideo EA122A1028 Automatic Air Vent W/Built-In Shut-Off Valve

The Resideo EA122A1028 Automatic Air Vent with Built-In Shut Off Valve is a small system that automatically vents trapped air from hydronic heating systems, increasing HVAC system and performance. Perfect for use in boilers, radiators and other closed-loop HVAC equipment, it assists in avoiding air-related problems such as noise less heat transfer and corrosion. The system has an inbuilt shut-off valve that makes it easy to maintain or replace without draining the system. This air vent increases system reliability increases equipment life and maximizes energy use.