Product Description Enhance the performance of your RO system and experience perfectly purified water with the Watts Premier 50 GPD Membrane Replacement, designed to work seamlessly with Watts Premier reverse osmosis filtration systems, specifically with 4SV/4-Stage (WP500025), 5SV/5-Stage (WP500032), and Zero Waste (WP0950045). Please note that it is not compatible with Quick Change reverse osmosis systems. This advanced semi-permeable membrane filter is highly effective in reducing TDS (Total Dissolved Solids) and sodium, as well as a wide range of contaminants, such as arsenic, lead, percolate, chromium, copper, and radium. Moreover, with the ability to filter impurities down to an extraordinary 1/10,000 of a micron, this membrane significantly enhances the purity of your drinking water, ensuring that it is free from even the smallest microscopic contaminants. Measuring 1.8" in diameter and 10.75" in length, the Watts Premier Membrane Replacement is designed for easy and straightforward installation and replacement in under-sink water filtration systems. It also features a check valve built directly into the membrane for efficient performance and reliable functionality. Crafted with high-quality materials, this membrane filter is engineered to provide superior performance. With a filter rating of 2 to 5 years, it offers dependable, long-lasting protection against contaminant; however, the actual lifespan may vary based on local water conditions, use patterns, and frequency of filter changes. From the Manufacturer Watts Premier Reverse Osmosis Membranes utilize an internal check valve, so make sure to use only Watts Premier replacement RO Membranes (yellow outer wrapping tape color) for your RO Systems. Watts Premier engineers are constantly working to provide a superior long lasting quality product to you our customers. Since Premier has RO Systems out in the marketplace since 1988, we noticed that check valves, typically placed in the elbow of the system, have a tendency to wear out over time. A RO system with a faulty check valve will become less efficient by running constantly. By placing the check valve in to the membrane, you are assured constant efficient performance due to the periodic replacement of this critical component of the RO system. Using Filmed sheeting, the Watts Premier Membranes are compatible with Premier as well as all 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, Percolate, Chromium, Copper, Radium and Protozoan Cysts, such as Giardia and Cryptosporidium. The heart of your Reverse Osmosis system reduces impurities down to 1/10,000 of a micron. Fits 5SV, 4SV, Manifold and Zero Waste systems.