I suppose it could be 7pm and I am grilling, run out of propane, go get the brewing tank and find that it's almost empty and then my local store is closed. This is probably what causes DG's OCD but I don't really want to have a lot of additional fuel around for when that inevitable house fire breaks out.
on your fancy new weber grill the tank is on a scale so once you empty one or two you'll be calibrated on your scale and know when the grill tank is almost gone. if it's close I'll actually pull it out early and use it for brewing so that I can empty it, and then go get it filled up at the next convenient time. it's pretty easy to avoid the both tanks being nearly empty scenario.
Edited by TheGuv, 15 July 2014 - 07:20 AM.