Product Description Compatibility: Suitable for your kitchen faucets with 1/2″ or 3/8″ FEMALE NPT thread. NO Faucet Included in Package. If a female threaded connector is needed to connect to your faucet, please contact us BEFORE purchase.Superior Material: With a filtration accuracy of 0.01 μm, the Ultrafiltration membrane filters out most of baçtёria larger than 0.01 μm. Activated carbon block and other advanced filter media ensure efficient and safe filtration. Specially selected premium materials are lead-free. The BPA-free, lead-free material ensures more reliable use from the inside out.Innovative Multistage Filtration: The Waterdrop Direct Connect Under Sink Water Filter System uses innovative multistage filtration. Tested by third party laboratory against NSF/ANSI 42 standard, the water filter can effectively reduce chlorine, taste and odor. And it can effectively reduces heavy metals, chemical iṁpurity, sediment and other large particles.[1] Tested by third party laboratory against NSF/ANSI 53 standard it can reduce lead. No need to buy bottled water anymore!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. Compact DesignExquisite and compact design helps to free up more under sink space.Steady，Fast Water FlowBy the high water flow, you can fill up one 12 oz cup of water in 5s.Firm and DurableHigh-strength materials have passed 300 psi pressure tests and 100,000+impulse tests.Safe MaterialsLead-free and BPA-free materials ensure the reliability and safety of products. Can the system reduce TDS?No. TDS value isn’t directly related to water quality.TDS stands for total dissolved solids.Waterdrop under counter water filter reduces harmful pσllutants while retains natural minerals, which are beneficial for your health. What is the difference between the WD-UA system and the WD-UB system?The WD-UA system does not come with a faucet. It will connect to your existing faucet. Meanwhile, the WD-UB system comes with an additional water faucet. Can the product filter well water?No. This system is designed for Municipal Tap Water. If using well water as the source, please make sure the feed water has been through a pre-filtration system. For the solution with a pre-filtration system, please search for WD-PFK.