Be aware Phil that if you change to Tru-design valves, that while the internal diameters remain the same, that the overall size of the valves and associated fittings are larger than for metal valves. They can still be fitted, but may require a little bit of innovative thinking to get them into the same space that the old metal valves and fittings occupied. I changed mine on my B36(2002) a few years ago, and was able to complete the job satisfactorily, but the last pieces to be screwed together were the through hull fittings and securing nuts. Essentially the seacocks and hose tails were screwed together before being placed into the locker under the washbasin in the correct orientation. Then the through hull fittings were pushed through from outside and the internal securing washers and nuts were loosely screwed on but not tightened so that the through hulls could first be fitted into the ends of the valves and tightened, and finally the internal securing nuts for the through hulls were tightened into place. The problem was that I wanted angled hose tails fitted, but even with straight hose tails there simply wasn’t enough room within that cupboard to turn the whole assembly onto an already fitted through hull, or individual parts or just the tails into place. It worked, and while I did put a hose test on the system from the outside, I did breathe easier after frequent checking during the first voyage after launching. Good luck with the job, but give me a shout if you need a hand.
