Provided is a filter module which includes: i) an elongated housing extending along an axis between a first and second end and defining an inner chamber; ii) a plurality of hollow fiber membranes comprising a semi-permeable cylindrical wall enclosing a lumen, wherein the membranes extend axially within the inner chamber between the first and second end; iii) a first end cap assembly comprising: a base secured to the first end of the housing, a feed port defining a passageway in fluid communication with the inner chamber, and a gas port adapted for connection to a source of pressurized gas and defining a passageway in fluid communication with the inner chamber; and iv) a second end cap assembly comprising: a base secured to the second end of the housing, a permeate port defining a passageway in fluid communication the lumens of the hollow fiber membranes, and a purge port defining a passageway in fluid communication with the inner chamber. The first end cap assembly includes an integral valve for controlling fluid flow through at least one of the gas port and feed port, and the second end cap assembly includes an integral valve for controlling fluid flow through at least one of the permeate port and purge port.