Patio Gas Cylinders are mainly used for Barbecues and Patio Heaters. Calor Patio Gas is available in two sizes. 5kg and 13kg. Both feature a 27mm clip on valve. Most Patio Gas Cylinders feature a handy gauge to give you an idea of how much gas is in the cylinder. We deliver to the area shown in map below - also use postcode checker on gas bottle pages to check your postcode.