Usually, you can simply slide the piece off or you may have to peel it away from the nozzle. [title] Line up the regulator with the top valve on the tank.
[header] How to use an oxygen tank [title] Slide the plastic covering off of the top valve on your tank. [step] There may be a plastic sheath that fits around the top nozzle on your oxygen tank. Before you can attach the regulator to the tank, you'll have to remove it.