Aluminum or Magnesium Anode Rod?

Old 12-27-11, 04:47 PM
Thread Starter
Join Date: Mar 2011
Location: USA
Posts: 187
Received 0 Upvotes on 0 Posts
Aluminum or Magnesium Anode Rod?

Hey Guys -

I'm looking at replacing my 12 year old Rheem 50 gallon gas water heater. I don't have any problems with it other than it getting old and a neighbors identical one recently starting to leak, so I figure it's time to replace mine.

My choices for replacement are a Bradford White with a magnesium anode rod or a State with an aluminum anode rod.

They both cost about the same and other than the anode rod, I can't find much difference between them.

I'm on city water and I think our water quality is probably very good.

Is there a reason to prefer one over the other?

Old 12-28-11, 08:28 AM
Group Moderator
Join Date: Oct 2004
Location: WI/MN
Posts: 19,179
Received 1,276 Upvotes on 1,215 Posts
Magnesium would be my choice - aluminum is a good choice if you have sulfer bacteria in your water which you should not.
Old 01-01-12, 02:09 PM
Join Date: Mar 2010
Location: USA
Posts: 4,575
Upvotes: 0
Received 287 Upvotes on 262 Posts
Magnesium anodes protect the tank a little better. In so doing they may also wear out faster.

Nothing wrong with removing an aluminum anode and substituting a magnesium one, unless you get undesirable odors in the water.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: