Propane kiosks outside stores including Sam’s Club allow shoppers to exchange and purchase new, portable propane tanks. Check for soot : There should not be any soot in or around appliances.

Costco also refills propane tanks, after first making sure the tank is empty and in a good condition to be refilled. The advertised price is $2.75 per gallon .

Before committing to a new propane tank purchase at Costco, there are some important things to keep in mind about what the warehouse giant will and won't do.