GAS EQUIPMENT, WATER AND AIR-CONDITIONING EQUIPMENT. In any engineering project even the smallest component can delay completion if it is late. We at Preseli pride ourse es on having the largest range and stock of Gas fuel handling equipment, Water and Airconditioning equipment in Hong Kong. We have included the more common items in this introduction, but if you do not find everything you need here please call us. With our extensive experience and worldwide sourcing ability we are confident of being able to help. Our job is to serve you, the engineering companies, in being able to complete your work quickly and efficiently.