<b>AQUACREST: Quality Water, Quality Life<b/><br><br><b> Normal TDS value</b><br>TDS stands for total dissolved solids. It is composed of inorganic salts and a small amount of organic matter. Our filter cannot obviously lower TDS values because it uses natural coconut shell activated carbon, which filters out harmful substances while retaining trace elements, which is beneficial to your health.<br><br><b>Replacement for these filter models:</b><br>Brita Classic 35557, 35516, 060258359916, 987554, OB03, 35503, 42432,<br>Mavea 107007, 766229, 001529, 10171019, 107007.<br><br><b>Replacement for these pitchers:</b><br>Brita pitchers include Grand, Lake, Capri, Wave, Metro, Amalfi, Soho, Infinity, Marina, Pacifica, Space Saver, Stainless Steel, Monterey, Altantis, and Ultramax dispenser. Great Value pitchers and replacement filters.<br>* AQUACREST is an independent brand. This filter is not an original Brita product.<br><br><b>Lifetime assurance:</b><br>We provide refund assurance throughout the entire lifetime of our filters! Our technology and customer service team offer a satisfying shopping experience without any risk. Our 24-hour service will still be available even if you contact customer service after Amazon’s 30-day return window.