(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 3 of 3

Thread: To delime or not to delime

  1. #1
    DIY Junior Member alexh's Avatar
    Join Date
    Jun 2009
    Location
    CA
    Posts
    12

    Default To delime or not to delime

    I have a 12 year old A.O. Smith that makes a lot of noise when heating.

    Smith has a very detailed document on how to delime but it does not seem to be a very common procedure since I can't find any stores which carry a delime kit. A search turns up advice on using CLR or vinegar.

    Is this worth a try?

    I searched here and found another thread that seemed to suggest living with it until the unit dies or replace it.

    Thanks

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,434

    Default

    At 12-years, it is probably on its last legs. Your anode rod is probably long gone, and what you are hearing is water caught in a small pinhole through the glass lining of the tank creating a burst of steam as the water gets heated since it is partially trapped there and can't cool off by convection. A delime at this time at that age may hasten its demise. The anode rod is scaraficial...it is more reactive than the walls of the WH, and gets attached first. Eventually, it litereally gets eaten up. If you don't replace it before that happens, it then starts eating up the tank. Once that starts, you're on the course of no return.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    DIY Junior Member alexh's Avatar
    Join Date
    Jun 2009
    Location
    CA
    Posts
    12

    Default

    Thanks Jim,

    I knew that noise is probably more than just lime buildup as it's very loud.

    Time for a new WH.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •