hook 34 is oriented in a horizontal direction and capable of being flexed allowing for a more secure fitting within the orifice 8 in any of the listed embodiments the hooks 34 allow the filter housing 12 to be secured on any of the rails 6 within the refrigerator 2 furthermore it is contemplated that the filter housing 12 may be inverted with the hooks 34 still capable of insertion into the orifices 8 of the rail therefore the hooks 34 allow a user to move the filter housing 12 to a different location within the refrigerator 2 and also invert the filter housing 12 if necessary the filter element 36 is provided for insertion into the filter housing 12 the filter element 36 may be inserted through the opening 26 into the hollow center of the filter housing 12 as shown in fig2 3 and 4 the opening 26 may be in different locations depending on the embodiment as the opening may replace the back wall 24 top wall 20 or outer side wall 18 referring to fig6 to insert the filter element 36 the user may simply slide the filter element 36 through the opening 26 into the filter housing 12 in one embodiment the filter housing 12 or filter element 36 may be provided with a snap fit means allowing for a more secure fit between the filter housing 12 and filter element 36 in another embodiment the interior of the filter housing 12 and the filter element 36 may be provided with magnets to ensure a connection when the.