Filtration assembly for use in aftertreatment systems for internal combustion engines

A filtration assembly structured to filter reductant, the filtration assembly comprising:

• an outer housing;
• and
• an inner housing positioned within the outer housing, the inner housing structured to contain the reductant, the inner housing comprising:
• an end face;
• a curved face contiguous with the end face;
• and
• a plurality of connecting ribs, each of the plurality of connecting ribs extending over the curved face and onto the end face, and each of the plurality of connecting ribs joining with at least one of the others of the plurality of connecting ribs on the end face.

A filtration assembly structured to filter reductant, the filtration assembly comprising:

• an outer housing;
• and
• an inner housing positioned within the outer housing, the inner housing structured to contain the reductant and operable between a first state in which the inner housing has a first volume and a second state in which the inner housing has a second volume that is larger than the first volume, the inner housing comprising:
• an end face,
• a curved face contiguous with the end face, and
• a plurality of connecting ribs, each of the plurality of connecting ribs extending over the curved face and onto the end face;
• wherein at least a portion of the inner housing is separated from the outer housing when the inner housing is in the first state and interfaces with the outer housing when the inner housing is in the second state.