A 1lb. tank has 197 psi, according to Bernzomatic's website. I assume a 20lb. tank would be the same pressure because it would turn to liquid at the same point.
First you must now what size of bottle you have a grill bottle is a 20# bottle and will hold 20 pounds of propane. On the side of bottle will be a TW or tare weight usally around 18.5 this is the...
the average "grill tank" holds twenty pounds of propane. if you look at the collar of the cylinder it will have a mark TW: 17.1 or something close to this. This stands for tear weight, or weight of...
for the average person this will not be possible. you will need a transfer pump.. it cannot be done with any everyday pump.. only suggestion would be to use whats in the used tank if possible..