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Waste tank collar is corroded

Discussion in 'Technical Discussion' started by Renny Bidinot, Jun 10, 2017.

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  1. Renny Bidinot

    Renny Bidinot New Member

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    Hi...My waste tank exit pipe ( about 3 inch ) that is at the bottom of the tank where the waste gets pumped out has a corrupted hole and leaks ....yes very bad . What do I do .
    Do I replace the tank and if so HOW. Or is there a kit that I can replace the male pipe that protrudes ( this pipe has a white heavy duty hose that goes over it and is connected to the pump out fitting .
    Thank you Renny
  2. Pascal

    Pascal Senior Member

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    What material is the tank made off? Since you said corrosion I assume it's a stainless steel tank. If so that fitting can probably welded but if there are other sign of corrosion it's probably better to replace depending on how much access you have

    Fiberglass is best for holding tank, no corrosion, or poly.
  3. Renny Bidinot

    Renny Bidinot New Member

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    Thank you for responding ....I believe it is galvanized .
    If I have to replace it ...how in Gods name do I take it out ????
  4. Pascal

    Pascal Senior Member

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    Galvanized isn't the best for a holding tank. How old is it and what kind of boat?

    Patching it up is fine if there are no sign of corrosion elsewhere but if the tank is rotting from the inside you re going to have to replace it sooner or later
  5. rcrapps

    rcrapps Senior Member

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    Any metal for a black water tank usually proves to be the wrong material to use.

    I believe it is galvanized.
    Hopefully not.
    This will loose to the powers of the black tank.

    What is the tank made of?
    If it's a metal tank also, electrolysis has or will soon destroy everything.
    Last edited: Jun 10, 2017
  6. g collis

    g collis Member

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    Either way it will be a sh**** job.
  7. 30West

    30West Member

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    Pictures? What boat?

    3" pipe is pretty big for this application. Does the pipe come off the bottom of the tank and run horizontal under the tank? Can the pipe be removed and plugged at the bottom of the tank?

    You might be able to drop a pipe down from the top of the tank to the bottom for pumping it out. You might be able to plug the existing exit from above, then install a suction pipe at the same time with that same access hole.

    Working on or taking the tank out might be simple or impossible, no way to know without pictures and better descriptions of the problem.
  8. Norseman

    Norseman Senior Member

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    Pictures...
    Don't be lazy when you ask for advice: Shoot pictures and post with your question.
    Then you may get better advice instead of folks guessing what you are talking about and giving general answers, rather than specific advice.
    Easy.

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