Originally Posted by gerrym51
how about when it is called a 5 gallon tank. is that 5 gallons of water-is that max?
Gerrym51, in the second weblink provided in post #13 of this forum it states the following:
How is propane weighed or measured?
Propane can be measured in a few manners. The most common way is by gallons. It can also be measured by pounds (1 gallon = 4.2lbs). When measured in gallons, a meter at the pump is used to determine the amount of propane that has been filled into a tank. When measured in pounds, the tare (empty starting) weight of the tank must be known first. After this weight is taken into account, the tank is then filled to capacity with the correct volume. (i.e. A BBQ tank is commonly referred to as a 20lb tank. This is because these tanks hold 20lbs, or approximately 5 gallons, of propane).
Hopefully, everyone who has been following this thread here, now know how to determine their propane capacities (and fill levels) of their various cylinders.
The people who exchange the tanks at Lowes, convenience stores, etc., do not really know/understand any of this, so I don't fault them too much. They were never trained to know this. They just relay the misinformation (aka propaganda) that Blue Rhino and/or Amerigas told them to tell the customers if anyone complained about the cylinders not being full (only having 15 pounds of propane). Using the OPD as an excuse with the fuzzy math, sounds plausible to the average Joe.......since John Q. Public doesn't know better.
However, that being said..............no matter how many times the lie is told, it doesn't make it the truth.
You just need to realize that when you exchange the tanks at most Blue Rhino or Amerigas places, you are only getting a 75% filled cylinder. It will be listed on the tag, just how many pounds are in the tank. The next time you walk by one of these propane exchange bins, take a look to see.
You can consider the lacking 25% as a convenience fee for being able to exchange the tank quickly and going on your way. LOL