Tankless Water Heaters

Discussion in 'Tankless Water Heater Forum' started by foxhome01, Aug 27, 2008.

  1. foxhome01

    foxhome01 New Member

    Messages:
    53
    Location:
    North Carolina
    As mentioned in a previous post, we've been having these black specks that are hard to clean. The plumber just called back and advised that it's actually manganese. A temporary fix is to have the anode rod replaced and the tank cleaned (with bleach) But he said that since it's a mineral in the water that reacts with the heating process it will come back.

    He recommended a tankless water heater (or electronic heater) as a premanent fix to the removal of the black specks. These are very expensive, of course. Before we engage in considering this, I thought I'd ask for feedback from others as to whether or not this is a suitable recommendation and if it would in fact eliminate our problem.

    Also, does anyone know how long these anode rods last before we might see these black specks again? Want to determine if it's worth putting the money towards replacing for a tankless heater NOW vs. dealing with the temporary fix until we can truely budget for it.

    Lastly - any alternative options you would recommend?
    Last edited: Aug 27, 2008
  2. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,362
    Location:
    Yakima WA
    I suggest you research the archives of this forum for comments and opinions about tankless water heaters.
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,183
    Location:
    New England
    Would swapping the existing anode with a different type resolve the problem? If heat preciptiates the mineral, you'll get the same thing in a tankless as you would in a tank. If it is a reaction with the anode in the tank, there are several other types available that may resolve that. Also, softening the water has other advantages and would be less expensive and provide other benefits at a lower cost than a tankless system.
  4. foxhome01

    foxhome01 New Member

    Messages:
    53
    Location:
    North Carolina
    The plumber suggested replacing with an aluminum rod, but said that b/c this mineral exists in our water it would return.

    I have done a search and none of the posts talk to the tankless system eliminating the issue (black specks).

    I called the plumber back to ask about a filtration system and it's an option, but it's just as expensive.
  5. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    The manganese will plug the tankless us pretty fast.
  6. Redwood

    Redwood Master Plumber

    Messages:
    7,450
    Location:
    Connecticut
    The aluminum anode eliminates the problem I believe.
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