Patent ID: 7441664

Claim:
A water treatment cartridge for treating water, said water treatment cartridge capable of sealingly and releasably engaging a water treatment device, said water treatment cartridge comprising: (a) a housing, an inlet for introducing water into said water treatment cartridge, an outlet port for egress of treated water from said water treatment cartridge, and a treatment media for treating water, said treatment media being in fluid communication with said inlet and said outlet port; (b) a first tube comprising an inside surface, an outside surface, a proximal end, and a distal end, wherein at least one of said inside surface and said outside surface comprises a sealing surface; and (c) a second tube comprising an inside surface, an outside surface, a proximal end, and a distal end, wherein at least one of said inside surface and said outside surface comprises a sealing surface; wherein said first tube extends from said housing and surrounds said outlet port forming a treated water passageway; wherein said second tube surrounds said first tube such that a gap is formed between said first tube, said second tube, and an outer surface of said housing; and wherein said gap is disposed between said inlet and said outlet port; and wherein said second tube extends from said first tube, and said first tube extends from said water treatment cartridge housing.