an anti torsion washer 54 and an end piece 56 the compression plate 50 sits on top of the filter stack and functions to seal the top end of the filter stack additionally it also provides a contact surface for the bottom end of the compression spring 52 which is located between the compression plate 50 and the anti torsion washer 54 in turn the anti torsion washer is located between the compression spring 52 and the end piece 56 the compression means functions to apply adjustable pressure to the compression plate which subsequently compresses the filter stack against the top side of the first end while this represents an exemplary embodiment it should be appreciated that various other means for providing adjustable pressure against the filter stack could also be implemented according to the present invention an embodiment of an immersion filtration array according to the invention is illustrated in fig5 a 5e and comprises a plurality of filtration modules 28 affixed to a base 90 via a corresponding plurality of common interface ports 92 in this exemplary embodiment the immersion filtration array is a three dimensional box 96 forming a plenum or base unit with a filtration module containing.