Heater and fan

 

Tech posted this on Sept. 17 under the forum topic Propane Tank Gauge.  Here's what he described as the hot water method:

 

"The "hot water method". Take a cup of hot water, pour it slowly down the side of the tank from the top shoulder. Keep the water in one line, don't pour it all over the tank. Wait a few seconds, then run your finger down the side of the tank where the water was. The top of the tank will still be hot. It will abruptly turn cold where the liquid begins because it can absorb the heat. The line where it changes is where your fuel level is. Note that if you do this to a fully-filled tank the line won't be at the very top. LPG tanks leave the top 20% empty for the gas and to allow for thermal expansion. This is the easiest and cheapest method and is the one I use."