Re: 1974 Catalina 27
I replaced some of the hoses for the holding tank on my C27. It was not a "fun" job. I doubled the hose clamps as required but have to admitt that hose was so hard to work with that I think once it is on a fitting it would have to be cut to remove it. (I heated the hose ends or would never have got them on the fittings.) That said there is nothing technical about tank replacement but it may be more work than you expect.
Catalina 27 Aft. galley, dinnet L/O
Saint John NB