Bought a CS30 last year. The propane tank was past its date and could not be refilled so I looked around for a new one. Its a 10lb tank but it has to be tall and narrow to fit in the propane locker. Problem is that just about all 10lb tanks are the short and fat models. None of the standard large chain stores stock them. Had to go to a specialty propane store and have them order it. It cost me just under $100. Found out later that I could have had the old tank refurbished for abut $50. Bottom line
is you'll need to check the yellow pages and make some phone calls.