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Source for large non-metrc thermostatic radiator valve

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if the OD is just under 2 inches. The walls of the pipe are roughly 1/8" thick in those sizes.

Try Danfoss, Honeywell-Braukmann, or Macon Controls to locate what you need.

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  • Al Roethlisberger
    Al Roethlisberger Member Posts: 194
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    Source for large non-metric thermostatic radiator valves


    So, I am doing a little maintenance on my old hot water radiator system(ca 1929) before the cold weather comes to stay, and I have at least one radiator that needs a new valve.

    Since I was going to have to replace the valve anyway, I thought I would look into installing a thermostatic radiator valve(TRV).

    However, the problem I am finding is that:

    1) Most vendors of TRVs seem to be overseas
    2) The sizing is metric
    3) And regardless of sizing, the largest size I run across seems to be 15mm

    Well, being an old overhead gravity system, my piping is quite large, and the radiator in question is supplied by a 2 inch valve.

    So my question is, can anyone recommend a manufacturer that makes TRVs in larger standard sizes?

    Thanks!
    Al


    P.S.

    Sizing question: The valve I am replacing does not have a size stamped on its body. However the black steel pipe supplying the valve measures approximately 2 inches outside diameter. Would that then require a "2 inch valve" ? Thanks.

    al_roethlisberger@yahoo.com

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  • Paul Pollets
    Paul Pollets Member Posts: 3,656
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    Large TRV's

    The largest available TRV is 11/4" in N America. Larger valve bodies of 11/12" or 2" are not imported, or only available in metric sizes.

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  • Al Roethlisberger
    Al Roethlisberger Member Posts: 194
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    Any vendor to recommend I call for these larger TRV models?

    Thanks Paul,

    Do you have any particular make/model to point me to for research?

    I've been told in the previous post that an outside diameter black pipe of 2 inches is actually a "1 1/2 inch" pipe. So that being said, I suspect I could step down to a "1 1/4" without any big deal on this radiator.

    So if you know which vendor has a TRV available in this size, it would be really helpful.

    My local plumbing supply guys have no clue on this topic since no one seems to have boilers hardly anymore around here. So if you can recommend a vendor I can call to further clarify what sizes and models they have, that would be really helpful as well.

    Thanks
    Al

    al_roethlisberger@yahoo.com

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  • Daniel_3
    Daniel_3 Member Posts: 543
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    Hey Al, How ya doing? Hope ya find those trv's to match your system.
  • Al Roethlisberger
    Al Roethlisberger Member Posts: 194
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    Hiya =)

    Doin fine, just starting to give the old system a minor tune up for this heating season. I'm going to try to "fix" just one radiator(I've got two "dead" with stuck valves, and a couple that need some TLC) this year to sort through any "lessons learned" and "catch 22s" that might show up. So that's where the search for an appropriately sized TRV came from. Since I can't really zone this old overhead gravity system, I'm hoping to put TRVs in a few rooms that really don't need the radiators running full blast all the time.

    And I'm fixing or reinstalling some various safety oversights from the PO that did the DIY boiler install years ago which includes a proper pressure relief valve instead of the water heater TPV valve he used, no pressure gauge, no system air bleed valve, and other oddities. But I'll have all that squared away before firing this old gal back up this year.

    I figure I used last year to get to know the system, this year will be the initial "tinkering" learning curve, and next year I'll do some minor surgery based on what I learned this year =)

    Should be fun.

    Al

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  • Eric_8
    Eric_8 Member Posts: 66
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    trv

    Try Macon, they may have a coversion kit to fit your exsiting valve. It would be a lot less work.
  • mtfallsmikey
    mtfallsmikey Member Posts: 765
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    while we are on the TRV train

    Any opinions on who manufactures the best ones in relation to performance?
  • Paul Pollets
    Paul Pollets Member Posts: 3,656
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    TRV source

    My source is Chris Rorke at Blueline Supply(307) 733-3953 in Jackson Hole, WY. I use Oventrop metric models for the large TRV's and The "Rorke Method" for adapting the metric TRV body to US pipe threads.

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This discussion has been closed.