opnspaces wrote:
Unfortunately the gauge Pine5008 posted won't do what you want. The problem is that a propane tank is liquid on the bottom and vapor on the top. RV's pull the vapor off the top and as the vapor comes off the top the liquid boils and releases more vapor to replace what was lost.
So the gauges that hook on the regulator will only tell you that you have pressure in the tank. The pressure will be the same whether you have a full tank, half tank, or 1/4 tank. Once the tank is empty the gauge will suddenly drop from full to empty. There really isn't much in between.
Thank you for sharing that. I was just looking at those gauges. I will just keep one tank shut off until the other is empty. Then when the furnace quits when it is rainy and cold my wife can send me out to switch tanks. :-)