Maid-O-Mist Air Automatic Vent


Old 11-23-15, 06:19 PM
Thread Starter
Join Date: Aug 2005
Location: USA
Posts: 108
Received 0 Votes on 0 Posts
Question Maid-O-Mist Air Automatic Vent


My hot water heat system makes a lot of banging noise in all zones, 3 zone system with about 5 “Maid-O-Mist Automatic Air Vent” installed all over the system. I opened the cover valve of each of those vents and I pressed the valve until all air and little water came out, now those vent full of water, no water leaks from the valve but no air anymore inside the valves only water , do I need to replace these air vent or still good? Also the banging did not go away. Any help appreciated Thanks
Sponsored Links
Old 11-24-15, 06:18 AM
Join Date: May 2006
Location: upstate New York
Posts: 397
Received 0 Votes on 0 Posts
air vents

Hi, I always understood that those vents are supposed to automatically release air that's trapped inside them, IF the screw-on cap is left loose. The problem I've had with them is that after a few years they start to leak water from the "valve" (like a tire valve). They're cheap enough to replace. Not sure about your banging-

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: