Push filter with floating key lock

A refrigerator comprising:

• a manifold configured to receive a filter cartridge assembly;
• and
• a filter cartridge assembly comprising:
• a housing having a substantially cylindrical body and a top portion for forming a fluid tight seal with the body, the housing top portion having an axial center and further including:
• an ingress port and an egress port extending from the housing top portion, each of said ingress port and egress port having a body with a top segment, a middle segment, and a bottom segment adjacent to the housing top portion and in fluid communication with said cylindrical body, the ingress port and egress port top segments having at least one seal at the junction with said middle segments, and the ingress port and egress port bottom segments having at least one seal at the junction with said middle segments, each of said seals having an outer surface first diameter, and the ingress port and egress port middle segments having an outer surface with a second diametric extension less than the ingress port and egress port respective seal first diameters, such that the ingress port middle segment and egress port middle segment are formed in an hourglass shape;
• a filter key located on or connected to the housing for mating attachment to a filter base, the filter key comprising an extended finger including on one side a contacting portion forming a first angle in a first direction with respect to the housing top portion and an adjacent side forming a second angle in the first direction with respect to the housing top portion, such that the first angle and the second angle are not equal;
• an electronic circuit component housing disposed adjacent to the filter key and having a recess for receiving an electronic circuit component therein, and for further connecting said electronic circuit component to the housing top portion, said electronic circuit component housing located on or connected to the filter cartridge assembly housing, said electronic circuit component housing as least partially surrounding the filter key and said filter key extending partially into the electronic circuit component housing recess;
• and
• a cavity on the ingress port middle segment for the passage of fluid, and a cavity on the egress port middle segment for the passage of fluid, the ingress port cavity and egress port cavity exposed in a direction facing away from the electronic circuit component housing.