All good comments, nevertheless I'll give it a try.
I'm putting a check valve in the FW line to prevent saltwater backflowing into the FW tank.
Re starving the
engine of
water, I watched the
exhaust with the
galley pump running and there was no noticable decrease in
water flow out. In any case, I'd have to leave the
galley pump running for an awful long time to cause
engine overheating.
My sailing is coastal, and I have a completely separate FW tank, so even if I did contaminate the main tank, I've got a few days back-up and won't die of thirst.
Graeme