Water tank.... overflow

I will add that it can be very easy to overfill and do damage if your not monitoring the hose as it fills. On my last three trailers the hose would stay in the fill tube without being held. The overflow is much smaller than the gravity fill so if you have the hose cranked up once it gets full it can pressurize the tank and bend or break the support brackets. I found out the hard way. I have seen it actually lift up the floor in a trailer and heard about a motor home that ruined his floor inside and burst the tank when he forgot and left the hose going for too long. So bottom line it will spit water back at you but make sure your standing there when it does so you can shut off the water.