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.

Running 1/2" PEX through a 3/4" PEX chase

Scienceman Member Posts: 1
I used Watts 3/4" radiant PEX between the 2nd floor and the basement in a 200+ year old house as a chase for 1/2" Wisbro hePEX. Will this be a problem as a result of differential rates of expansion? I did not want the Wisbro PEX to be abraded as it was fed through this chase to and from the header.


  • kcopp
    kcopp Member Posts: 4,441
    IF you can get the tubing through there you will be fine.
    EBEBRATT-Ed Member Posts: 15,616
    doubt it will fit but go for it
  • Zman
    Zman Member Posts: 7,573
    I have done short sections like that to avoid abrasion from metal plaster lathe. It worked just fine.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • PatN
    PatN Member Posts: 19
    I have used ENT tubing for sleeving pex many times. l
    3/4 in. x 100 ft. ENT Coil - Google carlon ent/smurf tube