A plumbing fixture having at least a housing, which forms an opening surrounded by a collar and an interior space, a fastening member, which can be disposed adjacent to the collar in the housing, a cartridge holder, which can be positioned in the interior space, a cartridge, which can be positioned at least partially in the interior space, and a tensioning member, which by direct contact can tension at least the cartridge or the cartridge holder against the fastening member.