I have several questions about CO2 tanks. I did some horse trading for a used 10lb powertank shortly after I purchased my LC. Before attending CM2005 it was filled and used several times during Cruise Moab and the remainder of the summer.When I went on the Snow and Pizza Run in January I found it empty even though I thought it shoud have enough to fill back up one more time. So this spring before CM2006 I filled it again and never used it. I went out this evening to get ready for a trip I noticed the mounting strap was loose so I went to repostion it and it seemed light, so I pulled it out. It was empty?? Tank is stored horizontial with the tank valve closed and the regulater cleared of pressure. I know the tanks should be used in the vertical postion, but thought horizontial storage was ok? Is it a heat issue I dont remove the tank from the vehicle as it is not a daily driver. Could the heat be causing the tank pressure relief valve to blow off?
Thanks in advance for any insight