Replacement Valve

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JJohn
JJohn Posts: 4
in Radiant Heating

I am looking to replace this valve of this radiant heating manifold. Can anyone identify the manufacturer or part? The thermal actuators are Mr.Pex.

20260111_152705.jpg 20260108_083006.jpg

Comments

  • mattmia2
    mattmia2 Posts: 18,399

    can you take it apart and replace the o-ring?

  • hot_rod
    hot_rod Posts: 28,708

    If it is a Mr Pex manifold, they still show parts for those composite manifolds. Download their catalog online. Page 36 is parts.

    A new o-ring may fix it unless the pin is worn, pitted, or damaged

    Screenshot 2026-01-12 at 12.16.08 PM.png
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • hot_rod
    hot_rod Posts: 28,708

    Has the 3rd from right actuator been replaced, the water stain might be from a stem leak?

    Ideally when actuators are below the manifold they should be the sealed NEMA 5 type. So a leak doesn't get into the actuator and short it out. The Caleffi 6564 is a sealed actuator, as an example.

    Screenshot 2026-01-12 at 12.27.02 PM.png
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream

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