Patent ID: 7413668
Filing Date: 2008-08-19
Classification: B01D,C02F,Y10S

Abstract:
1. A method of preventing unauthorized filters from being used in a filter holder, the method comprising: providing a filter holder comprising two fluid connectors; providing a filter having a top end and a bottom end, and the top end of the filter comprising two side-by-side water ports for fluid communication with said two filter holder connectors; providing a key system on said water ports selected from the group consisting of: a female port having a key slot that mates with a key tab that extends outward from a male tube of one of said connectors, and a male port having a key tab that mates with a key slot in a female tube of one of said connectors; and placing said two side-by-side ports in fluid communication with said connectors of the filter holder by mating the key slot and the key tab of the key system together.