Fresh Water Holding Tank - Do I need to keep water in it?

Tried carrying 1/3 or less when travelling for emergencies but more often than not when I needed water when stopped on the side of the road or anywhere when hitched the water pick up failed.

I'm thinking the angle of the trailer when hitched prevents water from getting pulled into the pump. Side to side angle can effect it also.

Now I dont travel with less than half.


Ron W.