Compatibility: Suitable for faucets with 1/2" or 3/8" FEMALE NPT thread. If a female threaded connector is needed to connect to your faucet, please contact us BEFORE purchase. Innovative multistage filtration: The Waterdrop Direct Connect Undersink Water Filtration System uses innovative multistage filtration. And it can effectively reduces chlorine, heavy metals, chemical pollutants, sediment and other large particles.[2] Enjoy healthy and pure water straight from your tap – no need to buy bottled water anymore! NSF certified filter: Specially selected premium materials are lead-free, which is fully certified by the WQA against NSF 372 standard. Activated carbon block and other advanced filter media ensure efficient and safe filtration. KDF effectively keep filter sanitary.Tested against NSF 42 standards, it effectively reduces chlorine, taste and odor. The BPA-free, lead-free material ensures more reliable use from the inside out. Easy installation: The system should be connected only to a cold water supply. With innovative push-to-connect fittings, the entire installation process takes less than 3 minutes. The twist-and-lock design ensures that you can replace the filter in 3 seconds. The system includes a 3/8” hose with a direct connection that adapts to standard 3/8’’ feed water valves under US sinks. The 3/8’’–1/2’’ convertor fitting helps you connect the system to both 1/2’’ and 3/8’’ cold water lines and faucets. Fast flow rate & multiple uses: The fast and stable water supply provides pure water that tastes like spring water. The tested full flow rate is 0.75 gpm at 60 psi. Developed for household and commercial use, the Undersink Water Filtration System can be installed in your kitchen, bathroom, RV, or office to meet your daily water needs. With its exquisite design and small size, it is the best choice for a rented apartment. Ideal for drinking, cooking, skincare, and cleaning.