When you first purchase an Ogaz gas cylinder, you are issued with a refill agreement charge. All Ogaz gas cylinders remain Ogaz’s property for the duration of use and this allows Ogaz to exchange cylinders included in your order with supplies of gas.
Ogaz will refill gas cylinders by providing you with a pre-filled Cylinder in exchange for the empty cylinder. A cylinder can only be exchanged for a similar replacement bottle.
Here are a few helpful Dos & Don't for handling gas cylinders: