7-Stage Zoi Mu Alkalinity Reverse Osmosis (RO) Drinking Water Filter System w/ Aptera Alkaline Filter - Includes FREE Flowlok Leak Detection System 7-stage RO system with acid neutralizing pH filter and Aptera alkaline filter Sediment & carbon pre-filters, along with the high-quality membrane, remove 95% of all contaminates Aptera alkaline filter alkalinizes the water, increasing the pH to between 8.0-9.0 and lowering ORP FREE Flowlok safety kit included! The products shuts off the water when a leak is detected. High-quality RO drinking water system includes tank, faucet, installation kit, and instructions