The Waterdrop TSU 0.01μm Ultra-Filtration Under Sink Water Filter System is a reliable water filter system that delivers pure and healthy filtered water at any time, regardless of how you use it. It's easy to install and can be installed directly at the sink faucet with just one click - no need for external filters or bulky vessels under your sink! This system has been tested many times to ensure that after installation the purified water is completely safe for drinking and cooking. The advanced multi-layer ultrafiltration membrane not only removes most chlorine but also taste, odor, lead, chloramine, fluoride, heavy metals, etc., giving you perfect purified water every day without using chemicals or salt as an alternative.