(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 4 of 4

Thread: Anode rods...Magnesium vs Aluminum

  1. #1
    DIY Junior Member Its.me.again's Avatar
    Join Date
    Oct 2012
    Location
    Buffalo, NY
    Posts
    7

    Default Anode rods...Magnesium vs Aluminum

    I actually ordered a spare anode rod for future replacement in my new 30 gallon electric hot water tank. (I had replaced one before in the previous tank. )

    But I never know what material is the best to buy. Magnesium or Aluminum? What is the difference? Also, when I cut the new rod...should it be 4 to 6 inches from the tank bottom?

    I have ordered aluminum, only because it was cheaper and I like cheap 6 year tanks, too as my water is public water system but it seems to eat the rods fast. I believe it is hard water, a lot of white deposits collect in hot water tanks/ showerheads...etc.

    Thank you.

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,448

    Default

    Different metals react differently with the local water quality. As to which is best, it also depends somewhat on the water quality is. Some can react and release gas into the water that comes out when you draw water at the tap. So, as to whether one is better than the other, it is a local decision.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,687

    Default

    Magnesium can create an odor, but as a practical matter as far as changing anode rods is concerned, I agree with the plumber I was talking to last Friday. He said the number of anode rods he has changed is ZERO, and I said I had changed ONE. My normal anode rod replacement is a 3/4" brass plug. My experience with them is the same as draining the heater. If you do it, the heater might last 7 years, if you do not, it may only last 84 months.
    Licensed residential and commercial plumber

  4. #4
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,662

    Default

    Quote Originally Posted by hj View Post
    My experience with them is the same as draining the heater. If you do it, the heater might last 7 years, if you do not, it may only last 84 months.

    That is Funny, I don't care who you are. lol

    I agree.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

Similar Threads

  1. Still Rotten Egg smell after replacing aluminum rods
    By ArayT in forum Water Softener Forum, problems, installation and reviews
    Replies: 13
    Last Post: 06-19-2011, 07:03 PM
  2. Does anyone change anode rods?
    By ballvalve in forum Water Heater Forum, Tanks
    Replies: 5
    Last Post: 12-01-2010, 04:21 AM
  3. Anode rod - magnesium - right choice ?
    By dikshe in forum Water Heater Forum, Tanks
    Replies: 1
    Last Post: 02-17-2009, 06:14 AM
  4. Replacing water heater anode rods?
    By Billy_Bob in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 5
    Last Post: 04-28-2008, 12:05 PM
  5. Hot Water Anode Rods
    By Greg Wall in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 5
    Last Post: 05-08-2007, 11:47 AM

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
  •