If you don't know which Samsung water filter you need, go on the Appliance DIY Repairs website. They sell all the Samsung water filters, and will be able to tell you which one you need. They also come with instructions so you do it properly. We were getting the cheap ones but started getting a funny taste and had black bits in the water. We'd already bought a repair kit for our fridge from them, so we thought we'd get the filters there as well. The water does actually taste better now. If you follow the instructions properly, you can't really go wrong.
Fast Eddie, March 2011