Pre/Post filter pak #7209037 consists of (2) carbon block filters (Use Prefilter #32-250125975 & Postfilter #02-250190975)
18 gpd tfc membrane (used in both RO's, different p/n's reflect vendor changes: Osmonics/Desal, FilmTec, etc) : 7096086, 7210046, 7221217
Flow Control is an INSERT type located in the 1/4 drain line tubing (#7199402). We recommend using the 15-18 GPD Flow Control for the 15-18 GPD TFC Membrane.