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single hole TRV conversion valve for cast radiators

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hot_rod
hot_rod Member Posts: 22,137
in THE MAIN WALL
For that large L shaped radiator I brought home.

The valve is a Euro version, straight hemp thread. So the FIP hole in the bushing needs to be enlarged a bit.

Loctite is the best way to seal straight threads like this.

I snaked a piece of pex to the opposite end with a pex ell flowing up into the end section, It slips over the 12mm tube on the 455 conversion valve.

It seems to warm nice and evenly, just under 1.25 gpm. In a few weeks I will have an IR camera to take a look.
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream
kcopp

Comments

  • Bob Bona_4
    Bob Bona_4 Member Posts: 2,083
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    Very cool...didn't Hydronic Alternatives offer at least a valve only version?
  • hot_rod
    hot_rod Member Posts: 22,137
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    Maybe, I think Oventrop does, or did also. not sure if theirs are US thread.

    The connector nuts on the Caleffi were 12mm, so I belt sanded down a piece of 1/2 od copper until it slipped into the compression ferrules.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • kcopp
    kcopp Member Posts: 4,432
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    Very cool. I have never used those valves before but have done the pex trick where I could only have access to the one side of the radiator.

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