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A 100 gal propane tank tends to sit horizontally above ground. They are big enough to heat smaller homes with propane. They also frequently fuel stoves for small residences or mobile homes. Mobile home owners often use two 100 gallon propane tanks to heat their home.

100 gallons of propane weighs around 424 pounds. You may have noticed that your propane tank is never 100% fuel. This is done as a safety precaution. Propane expands around heat. If your tank were to be completely full, and the temperature rose, the tank would become potentially dangerous.