I went to Menards tonight after we filled the tank with gas, so that I could get a fill on LP. The girl screwed the nozzle on the fill port and pulled the trigger, gas shot out the vent, so she tried ...
What do you mean by vent? Pressure relief Valve? Take haste to a propane dealer, not a dispenser. A place with the 20,000 gal tanks that has repair service.