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  • Cleaning Domestic Hot Water Coil

    My Dad has an oil-fired boiler with a domestic hot water heating coil in it. The coil needs to be cleaned. I sweated on a couple of isolation valves and the fittings to couple up two short garden hoses and a pump so I can pump a solution through the coil. The last time I did it I think I used CLR or similar product. My question is, is there a better type of coil cleaner I can pump through there? Thanks fellas.

  • #2
    Re: Cleaning Domestic Hot Water Coil

    I've had good results using Un-Lime sold by AO Smith

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    • #3
      Re: Cleaning Domestic Hot Water Coil

      There is a product called Sizzle though you can not buy it without a plumbing license. It does a fine job indeed but better than 1/2 the time it will eat right through the coil. If this is a recurring problem do your old man a favor and put in an indirect. Coils suck. They plug up, don't make steady hot water or enough of it and are very very costly to operate.
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      • #4
        Re: Cleaning Domestic Hot Water Coil

        Thanks for the advice NHMaster3015. I will probably go the indirect water heater route. Can you recommend a good one? I don't mind spending the money to set them (my parents) straight. There's just the two of them, would a 50 gal. unit have enough capacity? I have friends in the trade so a licensed only product would not be a problem obtaining.

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        • #5
          Re: Cleaning Domestic Hot Water Coil

          Aa 40 gallon Super-Stor should get the job done and the price is right also.
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