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43 convertible holding tank

Discussion in 'Viking Yacht' started by butch w, Sep 27, 2022.

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  1. butch w, Sep 27, 2022
    #1
    butch w

    butch w Member

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    Arnold MD
    Hello all,

    I just joined the forum and hopefully I can contribute some in the future, however I come for help ;)
    I have a new to me 2001 43 viking convertible. The holding tank has a few leaks at the top plate that is screwed down into the tank that holds all of the fittings for the discharge, pomp out, vent hoses etc.

    I am in need of a complete new "plate" or top cap with the fitting to attach all of the hose. I have tried some home repair style methods and they have only held temporarily. Any advise will be greatly appreciated.

    Attached Files:

  2. MBevins, Sep 27, 2022
    #2
    MBevins

    MBevins Senior Member

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    Windsor On. Canada
    I suspect that removal, cleaning, sealing as required will solve your problem. The tank is fiberglass, the plate a composite of some sort, both have a lifespan of decades. The sealants and O rings, not so much
  3. butch w, Sep 28, 2022
    #3
    butch w

    butch w Member

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    Location:
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    Thank you for the reply. There are a few cracks in the actual plate and some of the fittings on the top. I believe the previous owner had a block in the vent line and did a marina pump out and it made the tank expand or collapse some and cracked the plate which seems to be acrylic
  4. MBevins, Sep 28, 2022
    #4
    MBevins

    MBevins Senior Member

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    If he installed acrylic that's wrong material. Depending on size look for a piece of 1/4" thick GPO3 or similar fiberglass material, Lexan could also possibly work. GPO is expensive so don't be shocked.
    Cut to size , drill new holes as required.
    This is not a boat MFG supplied product.
  5. butch w, Sep 28, 2022
    #5
    butch w

    butch w Member

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    I am not sure if its acrylic or not, I don't have any better pics right now and am not near the boat currently. I have or had no idea that this is an aftermarket piece. I am assuming I need to get something custom made patterned from the cracked piece and figure out what type of gasket material to use. Thanks all
  6. MBevins, Sep 28, 2022
    #6
    MBevins

    MBevins Senior Member

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    It's a pretty basic DIY repair. Buy a piece as described, cut to same size. If you want lay the old one on top for template, Hole saw the appropriate size holes and reinstall cleaned up or replaced fittings.