Well, I have two water tanks in my boat. One larger, one not so large. When I originally purchased the boat I thought, what a rather silly notion! Why would I ever need two tanks. I put on my list to get rid of the smaller tank.
Well, once I was on a weekend sail with some guest aboard and I won't name any names, but in the evening we discover we have no water! Seems someone (?) left the faucet open. Hmmm... Loved having the extra tank then! I'll just make sure I turn off the pump motor
when not in use.
Second time, Another weekend cruise
. My wife yells "The engine
room is flooded!" Go below, sure enough, water is to the bottom of the engine! What the (*&(* , I just checked the bilge pump
. Had recently replaced the bilge
switch with an electrical
switch. Taste the water, hey! This is fresh water! Well ends up fresh water won't trigger the switch (that's a seperate thread) ends up, one of the hose fittings had work off (Yes, it was a user, captain
error!) In any case my fresh water tank
had emptied itself into the engine
room. Flipped manual bilge pump
switch, water goes right out. Discovered I didn't push the locking tab on my pump fully in! But I was GLAD to have the extra tank, Switched the valve to the other tank, weekend saved. We can still take a shower
in the morning!
So it is the notion that you can lose water from a tank for a whole lot of, mostly silly, reasons. If you're close to a place you can top up, no worries. If you're cruising, it could be inconvenient. (I even have a water maker, but when I am not cruising, I decommission it!)
I'd keep the valve.