Maid-O'-Mist Issues


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Old 11-26-13, 02:26 PM
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Maid-O'-Mist Issues

Several Of The Radiators In My Home Have Maid-O'-Mist's Installed And Every One Is Rusted To SHIZ... If I Depress The Pin In Any Of Them The Maid-O'-Mist Will Just Leak And The Float Wont Stop The Water... Used Some Teflon Tape And Nuts / Caps To Close Them Up

What Should I Do At This Point? I Want To Replace Them But What Auto Vents Should I Purchase? Watts?
 

Last edited by Weil-McLain; 11-26-13 at 02:51 PM.
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Old 11-26-13, 02:39 PM
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If these are steam rads they don't belong there anyway. You need steam vents.
 
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Old 11-26-13, 02:40 PM
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M-o-m

Carefull with the language, you have to camouflage it.
Sid
 
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Old 11-26-13, 02:41 PM
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It's A Hot Water System, Not Steam
 
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Old 11-26-13, 02:54 PM
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You need some type of manually bled coin vents. I use Taco. They're a little more expensive but worth it. There are different ones to check out. Those maids are for main line use.
 
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Old 11-26-13, 02:55 PM
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Could You Explain To Me What You Mean By Main Line Use? One Of Those Maids Are Also On My Weil-McLain Boiler With The Same Issue

The high-capacity, float-style vent can be placed either on the boiler or at the high points throughout the system.
 
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Old 11-26-13, 03:06 PM
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That's what I meant by main line. You've probably got one on your air scoop.
There generally used on your supply lines in the basement if needed.

The ones you need for your rads or baseboard are manually operated.

As far as them leaking you have 2 choices.
1) Tighten the cap but that will stop them from self bleeding
2) Replace them.
Personally I'm not a fan but opinions vary. Taco IMO makes a better one.
 
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Old 11-26-13, 03:10 PM
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So You Would Recommend Me To Change The One On My Boiler? Only 3-4 Of My Radiators Have Maids And Its My Understanding That The Maids Would Work But Its Better For Manually Operated Vents?
 
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Old 11-26-13, 03:19 PM
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Yes, it's much better with the manual ones. You can leave the maids on if yo want and just close the caps.
The one in the basement should be automatic but they make better ones.
 
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Old 11-26-13, 03:36 PM
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It Should Be But The Maid On The Boiler Is So Rusted And Filled With Junk That When I Pushed The Pin Down It Wouldnt Close Fully Anymore And Water Would Leak. I Was Forced To Close It. Which Automatic Float Valve Would You Recommend To Atleast Replace The One On My Boiler
 
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Old 11-26-13, 03:41 PM
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TACO makes a good one. That's what I use. When you see it you'll know why.
 
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Old 11-26-13, 03:51 PM
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Whats The Best Way To Go About Changing The Maid On My Boiler? Thanks So Much For All The Help Spott, You'r A Life Saver!
 
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Old 11-28-13, 07:46 AM
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Whats The Best Way To Go About Changing The Maid On My Boiler?
If you are only changing the M-O-M on the boiler, you generally don't need to completely drain the system.

If you turn the supply water off and drain until there is ZERO PRESSURE in the boiler, prepare the new vent for installation and set it at arms length so you can QUICKLY swap the old for the new...

Unscrew the old one, have your finger ready to put over the hole, pull the old one out and quickly screw the new one in, then re-pressurize the system.

BUT... since you will be changing the expansion tank also, you MAY need to drain the system anyway.
 
 

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