The Air Venturi Carbon Fiber Tank is the perfect option for a dedicated refill system. The unregulated open/close valve allows you to easily fill any of your PCP rifles up to 4500 psi.  The rubberized knob paired with the slow flow valve gives you precise control while keeping your air cylinder as cool as possible while filling. If you're looking for an air tank that can get you topped up in a matter of seconds, the Air Venturi carbon fiber tank should be at the top of your list.