Global Water Solutions Auto Airvents
Available in 3/8" And 1/2"
An auto air vent valve releases trapped pockets of air in your pipe work automatically so that airlocks are much less likely to occur. When the valve is open the float is hanging down and air can vent out of the central heating systems. When water enters the valve the float rises and closes the vent hole. Air will then accumulate in the pipe work and causes the float to drop down. This opens the valve and allows the air to vent.