Liquid treatment cartridge, liquid treatment system and method of placing a liquid treatment cartridge in a cartridge seat

摘要

A liquid treatment cartridge includes a housing of which at least a part is insertable into a cartridge seat through a mouth of the cartridge seat. The housing has an axis (23) corresponding to an intended direction of insertion of at least part of the housing into the cartridge seat. An axially leading section of the housing has a side wall (35) including a respective member (37a-d) of each of at least one pair of a guide groove (37) and a set of at least one protrusion (16) receivable in the guide groove during insertion of the liquid treatment cartridge into a cartridge seat having a side wall extending mainly in axial direction from the mouth and including the other member (16) of each pair. The housing includes a circumferential sealing rim (29) axially at a distance to the members (37a-d) of the at least one pair with which the side wall (35) is provided. The sealing rim (29) includes a section (39) protruding outwards from a remainder (35) of the housing and a further section (40) protruding in a mainly axial direction from an axially leading side of the section (39) protruding outwards. An outward-facing surface of at least the further section (40) of the sealing rim (29) is unifacial. The outward-facing surface is inclined with respect to the axis (23) such as to flare outwards towards an edge thereof distal to the section (39) from which the further section (40) protrudes.