Vortopt Q7 Replacement Filter Cartridge, NSF/ANSI 372/42 Certified, Reduces Chlorine, Lead, Bad Taste & Odor, 19000 Gallon 2-Year Life, BPA-Free Undersink Water Filter Replacement 【Powerful Filtration Performance】Perfectly compatible with Vortopt Q7 undersink water filter system. Effectively removes 99% residual chlorine, rust and fine impurities, while retaining beneficial trace minerals. Adopts NSF/ANSI 372 and NSF/ANSI 42 certified standard to deliver clean, fresh and safe drinking water for daily use. 【19000 Gallon Long Service Life】Premium replacement cartridge features up to 19000 gallon filtration capacity or 2-year service lifespan with 0.75 GPM stable water flow. Low replacement frequency cuts long-term use cost, saving 50% expense compared with ordinary filter cartridges. 【Easy Twist-and-Lock Replacement】Designed with twist-and-lock cartridge structure for 3-second quick replacement. No extra tools or complicated plumbing required, perfectly matching US standard 3/8" & 1/2" cold water lines, easy for household self-installation and replacement. 【Food-Grade Safe Material】Made of high-quality BPA-free and lead-free premium material, fully complies with NSF safety standards. Built-in high-efficiency CTO filter core efficiently improves bad water taste and odor, bringing pure and fresh water for cooking, brewing and daily cleaning. 【Wide Compatibility & Reliable Use】 Compact size fits perfectly under most kitchen sinks, ideal for homes, apartments, RVs and offices. Professional customized filter cartridge maintains the original purification effect of Q7 system, stable performance and worry-free after-sales support for long-term use.*Note: This replacement cartridge does not reduce TDS value, TDS is not the single standard for judging water safety.