Originally Posted by MikeinLA
If you happen to be someone who would rather see their boat sink than to open & close the seacock every time you take a whiz, like me, then be sure that you CLOSE the seacock before you disconnect the inlet hose from your head. It can be quite surprising if you forget.
Oh, and do replace the hoses.
Not much chance of that, Mike. We're sitting on the hard, as part of our major re-fit.
Many thanks to all, for the helpful hints. Removing the head went quite well. In fact, it went so well that we decided to delay installing the new one and remove floorboards, trace plumbing lines. I've been wanting to do this since we bought the boat in Oct 2009, and being on the hard is a great opportunity!