Isn't that how you know it is time to empty it?If you have a wife or a woman with you you will go through a lot a water. So you better leave the gray valve open or you be opening it every 8 hours or so. Or you may find you rv flooded I seen it coming out of the shower pan and on floor LOL.
Depends on pressure of the site. But as a general rule It's one or the other.Do you have your water pump on when you are hooked to their water?
That is what I thought as well. I have never thought about shutting off the spigot but might not be a bad idea. I probably will forget as well though. We did stay at one campground this year that had low pressure. We liked it and will probably go back. I might fill up my fresh tank and use the water pump if we do.No. No need to.
If I’m going to be gone all day, I may shut off the water spigot from the CG if I think of it so I usually always forget to do it.