Water Leaking From Automatic Air Vent

Guide to repairing an auto air vent aav.

Water leaking from automatic air vent. They only cost a few quid. It seems pretty clear that the valve itself is leaking and needs changing. Clogged condensate drain line. A high pressure will cause the pressure relief valve to open typically 3 bar if the auto air vent is leaking water it needs changing.

An automatic bleeding valve or air release valve arv is a plumbing valve used to automatically release trapped air from a heating system. John wirral august 2008. The water will slow down at that point. 5 causes of ac vent water leaks.

The automatic air vent should never let water out it is clapped out and should be replaced. If you mean the schrader valve on the expansion vessel is leaking water then the membrane in the vessel is burst. This is inevitable over time since it s a dark enclosed space specifically designed to filter out water. The easiest thing you can do to fix water leaking from your ac vent is to reach up and feel for any air escaping from around the sides of the air vent.

This made me look for an issue and the automatic vent valve appears to be leaking. You should only get a couple of quarts of water out until the pressure gauge shows 0. There is limescale on the brass there was evidence of water damage to the ceiling below it and a towel i put around the pipework below it is soaking. Then turn off the water to the autoimatic feeder and put a bucket under the relief vave and trip it.

Leaks can occur when the drain pipe becomes clogged with mold mildew dust and sludge. Yes the cap should be loose to allow it to automatically vent any air it valve is most likely clogged with sluge or scaled causing it to either stick or not seat correctly. Look for air escaping from anywhere besides the grates. Air or other gas may collect within plumbing for water delivery systems to taps and basins particularly with good main supply pressure this air is usually flushed through with the water flow and does not cause a problem although in some hot water.

Get the new vent ready with a little thread sealer.