Quote:
Originally Posted by Lake Fan
The exchange places fill the tanks with 15 pounds of propane. When you get a tank refilled they fill them to 20 pounds. More gas for the same or lower price.
Some places (Tractor Supply in Ossipee) will charge by the gallon. Good for when you just want to make sure you're topped off.
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Propane tanks have an overfill Protection Device. It acts like a float and will close the valve when it reaches 4.0 gallons of propane. Therefore you will never get a complete full tank. 17-18 lbs is the max you will get.