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  1. #51

    Re: Master head won't drain

    My problem was in the 90s and nipples on holding tank. Acid alone would not clear them.

    1983 61CY 319

    Jacksonville FL.

  2. #52

    Re: Master head won't drain

    Quote Originally Posted by Chasemmc View Post
    The other heads drain great.Has anyone just tapped into another heads drain line instead of pulling another 50' line?
    Have you tried the various acid solutions yet? You very likely have a very soluble, literally and figuratively, problem.
    Semper Siesta
    Robert Clarkson
    ASLAN, 1983 55C #343
    Charleston, SC

  3. #53

    Re: Master head won't drain

    Added the phosphoric acid to the line It only took about a pint. I hr later bubble bubble toil and trouble. Foaming and overflowing. Going to give it a day, drain as much as I can, and repeat. Disconnected at Blackwater tank, so I can tell if the line breaks open to drain.

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