Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.

If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Need to contact us? Visit https://heatinghelp.com/contact-us/.

Navien CH-240 Thumping

I have a CH-240 combo water heater, it has been working fine since installation in 2012, Now it has started to thump when we close the hotwater tap in the sink or the shower. I have read most of the discussions in the forum and didn't see anything on this problem. Just wondering if anyone has had this problem and what to do about it.
Thank you Harold

Comments

  • DZoroDZoro Posts: 771Member
    Has it been cleaned recently?
    Is there a pressure tank installed?
  • Keifer301Keifer301 Posts: 7Member
    Water hammer from your water pipes?
    Loose pipe(s) can make water hammer sound like it's coming from the boiler.
    If you can't find the point of cause or reach it, (like a loose pipe inside the shower wall), you could try a "water hammer arrester".
    Loving the fact to be known as an old timer and seeing the changes I have seen.
  • Jamie HallJamie Hall Posts: 10,657Member
    ^ this. These can be really pesky to find. It's quite possible that some hanger or clamp somewhere has come adrift...
    Jamie



    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.



    Hoffman Equipped System (all original except boiler), Weil-Mclain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
Sign In or Register to comment.

Welcome

It looks like you're new here. If you want to get involved, click one of these buttons!