My 1985 Nassau 34 needed new head hoses. Open any cabinet where they transversed and the smell was prominent. Last spring I concluded it was easier to install an entirely new system using the under V berth area for my new tank and so I ran my new, high end, hoses only a few feet to the new tank as the head was located next to the V berth. The old tank was/is back under the cockpit - a pretty good run from the bow. I removed all the hoses that ran through lockers and solidly plugged up the stubs that were left from the old tank - except for the pumpout which I left as it was. My intention was to remove the old tank, which would have to be cut out in sections due to its location - not a pleasant proposition. I was, at the time, leaving on a 1300 mile trip and as time ran out, I decided to just leave the old tank in with the lines suitably plugged. It posed no problem for the trip and is still, nearly a year later, doing fine. The old tank is situated in such a way as its removal would not give me much additional storage. I am considering just leaving it in place indefinately leaving the stubs of the old hoses plugged. I now have access to free pumpout so I could flush the old tank out repeatedly to reduce the odor if I were to cut it out. I am considering throwing bleach into it and letting that sit. My question is would the bleach eat at the plastic tank and/or the hose stubs. I am also considering just forgetting about the old tank and going about my life.
