Propane gauges measure your tank level as a
percentage. The gauge to the right shows the
tank level at about 25%. The number of gallons
left will depend on the size of your tank. 25%
of a 500 gallon tank is .25x500=125 gallons. A
delivery should be scheduled when your tank
reaches 20-25% to allow enough time for your
propane fill before your tank gets too low.
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