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.

Pex B to tankless gas water heater

dough041
dough041 Member Posts: 29
in Plumbing

I am installing a Rinnai gas tankless water heater.

My question is, should I run 18” of copper ( hot and cold ) from the unit then connect to pex? Not a good idea to run pex directly to the unit itself?

Comments

  • Big Ed_4
    Big Ed_4 Member Posts: 2,980
    edited August 18

    You want to come off the unit with hard pipe , secure the pipe to the building before Pex ..

    There was an error rendering this rich post.

  • hot_rod
    hot_rod Member Posts: 23,108

    A tankless valve kit is a good idea, as it will need occasional flushing

    Unless the installation manual tell you otherwise, I think you could pex to the valves

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    GroundUp
  • Larry Weingarten
    Larry Weingarten Member Posts: 3,563

    Hi, In some areas inspectors don't want any plastic pipe within a foot of the heater. I'd use stainless flex connectors from the heater and switch over to PEX from there. Or, find out how rules are enforced locally.

    Yours, Larry

    dough041

Categories