75 GPD (Gallons Per Day) Membrane Filter. Compatible with the Premier Standard Reverse Osmosis Systems. This semi permeable membrane effectively reduces TDS and sodium as well as a wide range of contaminants such as Arsenic, Lead, Percholate, Chromium, Copper, Radium and Protozoan Cysts including Giardia and Cryptosporidium. The heart of your Reverse Osmosis system reducing impurities down to 1/10,000 of a micron. Applications: 5SV, 4SV, WP-5, WP-4V, Zero Waste, *Note: This membrane is not for use with the quick change reverse osmosis systems. Specifications: Water Production: 75 GPD (Gallons Per Day). Filter Rating: 2-5 Years but membrane life may vary based on local water conditions, use patterns, and frequency of filter changes. Easy to install. Flow Restrictor: 700ml (Sold Separately Part No. 622054) Special Note: Due to a change in technology regarding the membrane and standard RO systems the flow restrictor on previous systems could not be cleaned. With our new in-line flow restrictor it can be removed, cleaned and replaced without having to purchase a new one.