The average cost to exchange a propane tank varies from $5.00 - $6.00 a gallon. The cost to refill a propane tank varies from $3.00 - $4.00 a gallon at most U-Haul propane refill locations. On average, you will be spending $1.76 less per gallon by refilling your propane tank rather than exchanging it
Between 35 to 45 dls.
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