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Thread: Flushing tankless water heater w/ vinegar

  1. #1
    DIY Junior Member H20Man's Avatar
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    Default Flushing tankless water heater w/ vinegar

    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?

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    DIY Senior Member Marlin336's Avatar
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    Quote Originally Posted by H20Man View Post
    Where do you get a 5 gal bucket of vinegar?
    Five 1 gallon containers at the food store plus an empty five gallon bucket. Or a membership to a restaurant supply center.

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    DIY Junior Member H20Man's Avatar
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    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 by H20Man; 01-14-2008 at 03:10 PM.

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    That's all folks! Gary Slusser's Avatar
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    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.
    Gary Slusser Retired (= out of business)
    Click Here to learn how to correctly size or program a water softener.
    CAUTION, as of Nov 12 2013 all YouTube videos showing how to rebuild a Clack valve have an error in them that can cause damage.

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    In the Trades Bob NH's Avatar
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    Quote Originally Posted by H20Man View Post
    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?
    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. #6
    Plumbing Contractor srdenny's Avatar
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    Something like this:
    http://www.zoeller.com/zcopump/produ...ff/310_311.htm
    with 2 short hoses and a bucket of vinegar.

  7. #7
    Master Plumber master plumber mark's Avatar
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    Talking 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. #8
    DIY Junior Member H20Man's Avatar
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    There's nothing wrong with mine. I'm just doing it for preventative reasons like the manual suggests.

    Quote Originally Posted by master plumber mark View Post
    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.....

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