Any issues with the tanks? The heater? Any "non-water friendly" things I should be watchful for (wallpaper, electric outlets)?
We have been living full time aboard during 13 years.. and we always enjoy to have a shower onboard..
The water heater was a 20 liters one (far enough for two) and using either the calories for the water cooled engine or the 220 volts electric resistance.. either from the quay (seldom) or from the diesel genset. and we had a pressure water pump too..
we also had a stainless steel tank under the shower with an automatic pump.
The shower walls (wall paper!) where of Red cedar wood.. no risks with the water..
I can't imagine living without a good shower on board..