Flushing tankless water heater w/ vinegar

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by H20Man, Jan 14, 2008.

  1. H20Man

    H20Man New Member

    Messages:
    12
    Location:
    Alabama
    Where do you get a 5 gal bucket of vinegar? Sams club or something?

    What about a good inexpensive pump to use for the flush? Do you just rig out some vinyl hose or whatever to the pump? I don't guess anybody sells a ready-to-go setup do they?
  2. TMB9862

    TMB9862 New Member

    Messages:
    206
    Five 1 gallon containers at the food store plus an empty five gallon bucket. Or a membership to a restaurant supply center.
  3. H20Man

    H20Man New Member

    Messages:
    12
    Location:
    Alabama
    What about the pump and hoses? Just rig something up from parts from Lowe's/HomerDepot? Most pumps you see there are like effluent pumps and are quite expensive....
    Any suggestions?
    Last edited: Jan 14, 2008
  4. Gary Slusser

    Gary Slusser That's all folks!

    If you have hardness scale in a water heater, you need a water softener. It will prevent more build up of scale and dissolve the scale build up in the tank.

    That's much better than attempting to use vinegar and then when done ot have more scale form because of hard water, and have to dod the vinegar thing every so often.

    I suggest a correctly sized softener for the family size, water quality and the SFR required by the house. It should have a Clack WS-1 control valve.
  5. Bob NH

    Bob NH In the Trades

    Messages:
    3,317
    Location:
    New Hampshire
    The small rubber-impeller "drill pumps" will circulate the vinegar. There is no significant pressure loss at the flows you will be using. They usually have threaded connections for standard hoses and washing machine hoses will work.
  6. srdenny

    srdenny Plumbing Contractor

    Messages:
    361
    Location:
    SF Peninsula
  7. a rash of flushing questions....

    this is the second or third person
    to inquire on how to de-lime their tankless
    water heaters....over the past month....

    the last guy with a totally clogged up heat exchanger never has posted wether he was
    successful or not in freeing up his exchanger.

    maked me wonder if he ever did succeed


    I wonder if this is going to be a bigger problem for
    people with hard water than they realize.....
  8. H20Man

    H20Man New Member

    Messages:
    12
    Location:
    Alabama
    There's nothing wrong with mine. I'm just doing it for preventative reasons like the manual suggests.

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