Water drainage assemblies for aftertreatment systems

A water drainage assembly for an aftertreatment system, comprising:

• a first tube configured to be coupled to an outlet conduit of the aftertreatment system;
• a second tube having a first end coupled to an outer surface of the first tube, a second end opposite the first end, and an intermediate portion located between the first end and the second end;
• and
• a baffle plate located in the second tube;
• wherein:
• the intermediate portion of the second tube surrounds an end portion of the first tube such that a volume is defined between the end portion of the first tube and the intermediate portion of the second tube;
• and
• the second tube comprises a drain port configured to allow water to drain from the volume defined between the end portion of the first tube and the intermediate portion of the second tube;
• and
• the baffle plate comprises:
• a central portion, and
• exactly two arms extending from a periphery of the central portion and attached to an inner surface of the second tube,
• wherein the central portion is spaced from the inner surface of the second tube by a gap through which exhaust is able to flow.