A 1000-gallon propane tank is a tank that is capable of holding 1000 gallons of propane. A typical 1000-gallon tank is filled with 800 gallons of propane since the gas needs room to expand.
1000-gallon propane tanks are used mainly in commercial settings where there is a high demand for propane gas, such as restaurants, but are also used in residential settings.
A 1000-gallon tank is very large and unsightly. Residential owners can choose to have the tank stored underground to make the yard look more pleasing to the eye. A small dome is left above ground for filling and servicing the tank.