Guaranteed low cost commercial cylinders and buffer vessels takes the hassle out of purchasing commercial cylinders with fresh streamlined process specially designed for u.k. building design consultants and m&e contractors. receive a same day price on equal or approved calorifiers and buffer vessels with free advice by qualified experts. Commercial cylinders directly supply calorifiers and buffer vessels in sizes 500 – 5000 litres in stainless steel and mild steel for your uk new builds or retrofit projects.