[Ultra-Long Service Life] When used with municipal water, this under sink water filter serves a life of 8,000, 16,000, 19,000 gallons or 12, 24, 36 months. [Innovative Multistage Filtration] Waterdrop undersink water filter adopts advanced multistage filtration to effectively reduce chlorine, odor, sediment, and other heavy metals, which is tested by the third-party laboratory. [Authority Guaranteed Materials] Premium lead-free materials are fully certified by the WQA against NSF/ANSI 372 standard. BPA-free materials are also ensured. Effective chlorine reduction is certified against NSF/ANSI 42 standard by the WQA. [Easy Installation] The under sink water filter should be connected only to a cold water supply. Easy to install because of the innovative push-to-connect fittings and the twist-and-lock design. [Fast Flow Rate & Multiple Uses] The fast and stable water supply and the compact design make the under sink water filter fits the kitchen, bathroom, RV, or small-scale offices to meet your various water needs.