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.

extra sacrificial anode

ziggypiggy555 Member Posts: 2
edited March 4 in Domestic Hot Water
would strapping  a  chunk of magnesium mounted to the hot water outflow pipe do any good as a sacrificial anode??

i've seen some interesting magnesium cathodic reduction systems on boats; they had a common grounding buss that went from a massive chunk of Mg mounted outside the hull, then wired to all metal parts/struts etc. & thought maybe for a water heater?? 😎


  • Larry Weingarten
    Larry Weingarten Member Posts: 3,302
    Hi, It would look neat, but would do no good at all. It works on boats because they are in water. You can add a second anode to most tank type heaters though. Can you post a photo of the top of the tank and connecting plumbing. With that we can help you figure out the best way forward.
    Yours, Larry
  • Jamie Hall
    Jamie Hall Member Posts: 23,313
    All the boats I've seen the anode was zinc...
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • kcopp
    kcopp Member Posts: 4,432
    A powered anode would be the best option if I were doing one...