Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.
If our community has helped you, please consider making a contribution to support this website. Thanks!

Replacement Valve

Options
JJohn
JJohn Member 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 Member Posts: 15,982

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

  • hot_rod
    hot_rod Member Posts: 27,053

    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 Member Posts: 27,053

    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

Categories