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    Please Help - Leaking Hy Vent (19 Posts)

  • Peter OC Peter OC @ 4:49 PM
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    Please Help - Leaking Taco Hy Vent

    Can someone please give me some advice on how to handle a leaking Taco Hy Vent??? Thanks!
  • lchmb lchmb @ 5:28 PM
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    where is it leaking?

    Is it leaking out of the air release valve or the seat? You can alway's close the hy vent but should get it replaced when you can. If it's leaking at the seat then it will have to come out to be replaced...:)
  • N/A @ 5:40 PM

    Speaking of Taco vents

    Every one of them we installed in the past few month have given us trouble at the vent cap . We cannot hand spin them closed anymore . You need pliers to close the little cap . Whats up with that ?
  • lchmb lchmb @ 5:59 PM
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    And not sure why but the last dozen I have put in let a little air out and then look like a water fountain. Sent them back to my supplier but not sure what's going on. Must be the hard mountain water up here..:)
  • Steve M Steve M @ 6:19 PM
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    From the hy-vent instructions

    "After system is filled, loosen cap slightly and allow air to be released slowly, otherwise scale and dirt might rush in causing valve to leak. If this happens, push down valve stem then pull uplightly to dislodge scale." "For normal venting, open cap one full turn." Make sure the cap is closed until you're ready to fill the system. Good luck
  • lchmb lchmb @ 6:26 PM
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    been there

    Done that...have the t-shirt to prove it..But, since I like the taco's better than anything else, we'll keep chuggin along..;) Could be I had a bad week..:o
  • looking4tacohyventreplacement looking4tacohyventreplacement @ 8:49 AM
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    TACO HY_VENT 400 leaking

    I have several TACO HY-VENT 400 bleeders.  Yes, I can screw the top cap off and clean out the vent.  I use a toothbrush to clean the body and scrub the valve assembly.  I actually disassemble the spring assembly and scrub down all of the parts. 
    However, they work OK for a short time and then they start leaking again.
    I am looking for a more reliable bleeder.  It sounds like the Honeywell EA122 is popular in this thread.
  • jerry scharf jerry scharf @ 11:54 PM
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    opinions on the least likely to leak air vent

    I have a situation where I would like to put a vent but it would really be a pain if it leaked. What are people's experience on which one does best on this front. thanks, jerry
  • Glenn Harrison Glenn Harrison @ 7:56 PM
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    My opinion,

    1. Spirotop, made by Spirotherm. 1/2" Female pipe thread connection. Also has a 1/2" male pipe thread connection on the top of the vent so you can connect piping to a less damaging location. 2. Honeywell EA122 airvent. The vent can be turned off with in itself and the top valve can be removed and cleaned to prevent plugging.
  • jim murtaugh jim murtaugh @ 8:46 PM
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  • Glenn Harrison Glenn Harrison @ 10:24 PM
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    We used to use Dole 2000

    vents and they constantly leaked. Then our main supply house started carrying the EA122 units. We switched to those and have been so happy ever since.
  • jerry scharf jerry scharf @ 12:13 AM
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    thanks for the response

    Just what I was looking for. jerry
  • Glenn Harrison Glenn Harrison @ 12:38 AM
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    My pleasure, Jerry.

  • Bill Bill @ 8:44 PM
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    replace it

    replace it
  • Joe Mattiello Joe Mattiello @ 10:43 AM
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    Taco Hy-Vent

    Good Morning Taco Hy-vents have been the industry leader for over 30 years, and have been proved to be of high quality, over, and over again. They may leak at times when system debris collects in the cylindrical body hindering the valves performance. One of the attributes of the Taco, hy-vent, is that you can take the top part off, clean out the body, reassemble it, and put it back in service. If the vent is installed in an area where some water that leaked would do harm, Taco offers a waste connector that attaches to the threaded connection, and can be run to a nearby sink, or drain. Hopefully this clears the air. Taco, Inc. Joe Mattiello Technical Service Technician 401-942-8000 X 484
    joe mattiello
  • looking4tacohyventreplacement looking4tacohyventreplacement @ 8:53 AM
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    Also looking for a taco hy-vent replacement

    I have several taco hy-vent 400 bleeders.  They work for a time and then they all leak.  I open the top, remove the float and spring valve assembly, take everything apart, and scrub down all of the parts with a toothbrush. 
    This works for a short time, and they start leaking again.
    It looks like the Honeywell EA122 is a popular replacement in this forum.
    I am looking forward to trying it.
  • icesailor icesailor @ 9:42 AM
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    Leaking Vents:

    After changing float vents by the gazillion when leaking around the cap, I started screwing them down tight. I've never had an issue with air stopping the flow.
    I found that the biggest culprits were the ones on the supply side, close to the boiler. Hot water got under the seats and evaporated. Leaving a white residue behind that finally caused the leaking valve. The same kind of leak caused when installers use red rubber circulator gaskets in place or in conjunction with the square cut O-rings supplied by the manufacturers. The same square cut O-rings used by boiler manufacturers on tankless plates. The red rubber gets as hard as the tar road and then cracks and leaks.
  • meplumber meplumber @ 10:03 AM
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    Supply side Hy vents.

    My friend icesailor is dead on.

    I put my hy vents on the return side at the last 90 as it returns to the boiler. Of course, I have the one Hy vent at the Air Scoop on the supply side, mostly for filling, but I isolate it with a Raven valve.

    By exposing the Hy vent to lower water temps, I have seen a drastic drop in Hy vent failure over the years.

    Putting a Raven valve on the air scoop is the only way to go. Every time I replace a Hy vent, a Raven goes in with the new one. This keeps me from having to drop system pressure when servicing or replacing the Hy vent.

    To the OP's question, they all leak. It is usually caused by dirt or long term exposure to high water temps. I have used them all Taco, Caleffi, Honeywell, Baukmann, Dole, etc...etc....
  • jboissy16 jboissy16 @ 9:36 AM
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    RE: Replacing Taco 400 Air Vent

    When replacing a taco air vent can I just isolate it where the values are, drain that section where its isolated replace it and open the values and thats it. Or Do I have to purge the entire system. Whats steps should be taken 
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