Patent ID: 7033502

Claim:
A filter cartridge adapted to be supported within a housing by at least one of a rounded upper end of a cylindrical UV lamp and a stud of the housing, said filter cartridge being adapted to filter fluid flowing therethrough and into said filter cartridge and past the UV lamp and to accommodate irradiation of the filtered water with UV, said filter cartridge comprising in combination: a) a cylindrical filter element having first and second opposed ends; b) a first end cap and a second end cap; c) said first end cap including a first annular flange juxtaposed with said first opposed end of said filter element, a first circular sleeve extending from said first annular flange axially away from said filter element, a positioning member defining an aperture in and being supported by said first annular flange, said positioning member including a circular shroud extending into said filter element for engaging and being adapted to receive support from the rounded upper end of the UV lamp and a first rim circumscribing said first opposed end of said filter element; and d) said second end cap including a second annular flange juxtaposed with said second opposed end of said filter element, a second circular sleeve extending from said second annular flange axially away from said filter element, said second circular sleeve having a diameter greater than the diameter of the UV lamp and adapted to engage and receive support from the stud, said second circular sleeve having a lesser outer diameter than the inner diameter of said first circular sleeve, a seal disposed intermediate said second circular sleeve and the stud, and a second rim circumscribing said second opposed end of said filter element.