It enables the air occurred in pipes and radiators of heating facilities to be collected and removed from the upper manifold. Removing the air in the systems without air bottle takes more time and causes problems. Sleeve on the upper side of the air bottle is for automatic air remover (purge valve). Sleeve on the lower side of the air bottle is required to fix bottle to the facility. While fixing the air bottle to the facility, it should be installed vertically as the purge valve is located towards upper side.