So, for a standard 20-pound tank, you'll only ... This is because propane, like any gas, will expand when it's subjected to high temperatures. If you fill the tank all the way, there's no space ...

“We fill a 20-pound tank for around $11,” he said. “When weather gets cooler, we maintain our price for the entire year.” Kirit said it costs $10.99 to pay with cash to refill a propane ...