We have KistchenAid refridgerator that needs a new water filter. Inside tha right wall the unit shows a Model number KSCS231 NWH00. I could not find the exact model number on line in your web page.Canyou advise me where I can find it and what filter I whold buy? Also canI change it my self? I dont see any instruction on removing in there manuals. R. Saenz robertmsaenz@msn.com