Well I wouldn't want to liveaboard or go cruising with out foot
pumps. I was the one who hollerd for a foot
pump aboard Yofy's galley. And now I'm angling for one in the head too. I have tested our water usage and with just the galley footpump we cut our water useage in half. Electric
pumps really do waste alot of water no matter how careful you are. BUT they are great for a shower

.
In the past while cruising and every now and then when our tank is low, I have had a wash in a couple of cups of water. It drives Manny mad. How can you do it? (It's all in a technique I learned while backpacking years ago

). Now if we're cruising in warm water, we jump in the sea and soap up and rinse with our deck shower. Just a quick rinse with a spring loaded nosel.
Still haven't figured how to cook pasta without using great gobs of water though...
Over here water is a BIG issue. You learn very quickly not to waste it.
(And in my experience the male sailors who complain about water usage usually are the ones who don't bother washing or shaving and then rave about how they save water.)