Brita Hydration Stations feature advanced filtration options to deliver great-tasting, filtered water using an NSF certified filtration system that reduces chlorine (taste / odor), lead, and removes 99.99% of cysts. Model 6441 is a 1500 gal capacity 1 micron coconut carbon block filter. Filter 6441 is for model 2500CT, 2500FS and 2520 systems.