The Alphacool ?Lighttower? reservoir leads to a new way of design and function. Though most reservoirs are only compatible with one or few pumps, this reservoir can be used with multiple pumps or be used even without a pump. This maximum of flexibility comes from the intelligent construction. If the reservoir needs to be fixed with screws, there are already 4 M4 threads available in the bottom of the reservoir (screws must be ordered separately)