In this series of videos, the krystalpureguy discusses the different filters used in the Krystal Pure KR10 & KR15 Reverse Osmosis systems. br br The krystalpureguy is not associated with the manufacturer, AMERIFLOW WATER SYSTEMS, or the retailer, LOWE'S, in any way other than the fact that I used to work for both of them and know them both well, and I am not responsible for their products or the level of customer service they provide. This site is maintained as a CUSTOMER SERVICE TOOL to attempt to answer your questions when you can't get help from the manufacturer or the retailer. If you have specific questions, email them to krystalpureguy@gmail.com and I'll try to steer you in the right direction. br If you have questions concerning REPLACEMENT PARTS, CONTACT THE MANUFACTURER at 1-888-579-7873.