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Taco series sweat mix valves

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Fid2973
Fid2973 Member Posts: 7
edited January 2023 in Radiant Heating
My 3 way sweat mixing valve is 3/4. I have noticed the outside of the housing to be close to 1” sweat fitting. Anyone sweat to the outside instead of the inside. I’m just trying to use what I have on hand.

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  • hot_rod
    hot_rod Member Posts: 22,482
    edited January 2023
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    Good chance the Cv is the same on the 3/4 and 1", just a different tailpiece.
    Look at the spec sheet for that model valve.

    Use a copper bell reducer if you can't replace the tailpiece.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,840
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    Suppose you could if it would fit. Not sure that valve is made that way though
  • hot_rod
    hot_rod Member Posts: 22,482
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    The ID of copier varies from K, L, or M
    One of them may be close enough to get a good sweat joint
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • HomerJSmith
    HomerJSmith Member Posts: 2,511
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    You're kidding me. Sweat to the inside and reduce it with a reducer coupling. Remove the control and make sure the valve is in the open position. I do one side at a time.

    This is an academic exercise, right.