Abstract: A filtration system for use in a beverage dispensing machine comprising a first and second boiler is described. The filtration system comprises: an input fluid line for connecting the system to a water source; a first filter module connected to the input fluid line; an output fluid conduit connected to the first filter and configured to have a first fluid output line for directing fluid to the first boiler and a second fluid output line for directing fluid to the second boiler; and a second filter module, located in the in the second fluid output line; wherein the second filter module is capable of removing ions not removeable by the first filter module.