Automatic Air Vent Valve Leaking Water

Float type automatic vents on hot water heating systems are normally left open to automatically purge air from the system.

Automatic air vent valve leaking water. It has an air purger with an expansion tank screwed into the bottom and an automatic air vent on top of the air purger. The one that was leaking did not leak at the new location but the other non leaking one leaked in the leaking location. The taco automatic coin vent installed on water or steam radiators the taco automatic coin vent is the ideal air purging device. An automatic bleeding valve or air release valve arv is a plumbing valve used to automatically release trapped air from a heating system.

For the heck of it i tried switching the autovents. I tried cleaning it out and reinstalled but it still leaked. The coin vent features special hygroscopic cellulose discs in the valve body that when dry allow air to be released from the system. Switched back and the leak is because of the location.

Here we explain how to repair or replace both manual heating system air bleed valves and automatic float type air vents that are leaky. Series fv 4 automatic vent valves are used in commercial and residential hydronic heating applications to provide automatic air venting for hot or cold water distribution systems. It consists of a brass body construction with male npt connection brass cover air vent with silicone rubber seal polyethylene float with valve plug and automatic. The air vent is leaking some water.

Guide to repairing an auto air vent aav. Based on tapping the expansion tank it does not seem waterlogged bottom 2 3rd of tank sounds hollow or empty. 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.