Here is an inexpensive hose attachment to make filling my (4) tanks easier. I got tired of having the nozzle come out, etc. This is just a foot of 3/8 clear hose, a female hose repair end and a shut off. Takes five minutes to make and it is much less fuss to fill the tank. Just stick the hose as far down as it will go and the hose stays put. It is a bit more sanitary too when using public dock hoses.