We have had a big hassle and too many expenses replacing Columbine's 1 gal. propane tank. The tank fits in a propane box in the aft lazarett. We finally had our local propane dealer merely replace our original tank's valve with the new safety valve. The $39 cost was a lot better than buying a new tank and propane box lid at a cost of over $100. It is now legal to fill the tank with propane for about $1.23. Chuck