Don't put the gas tank near a fire pit! The fumes could still ignite, even with water in it. Take a look at the pickup inside the tank and clean it out. I had that problem with the tank in my Superchief. I took the strainer off the end and I put a nut on it instead to keep it weighed down at the bottom of the tank. Now after a couple tanks of fresh fuel through it, and a new fuel filter down the line, of course, the fuel system is problem free.