Enjoy unlimited ultra-fresh, healthy, great-tasting drinking water straight from your kitchen tap for cooking and making delicious coffee, tea & ice. Save money, time, and hassle of buying costly, bottled water and live healthier with ultra-safe water that is 99% contaminant free. Pre-installed system body, you just have to connect the tubing to feed water, drain saddle hole, faucet, and storage tank. This complete 4-stage RO-TWIST removes up to 99% of contaminants, providing you with the purest water possible. 1st stage - Sediment Filter (TW-SED): Removes dust, particles, and rust. Protects and extends the life of the membrane and system. 2nd stage - Carbon Filter (TW-CAB): Reduce chlorine, tastes, odors, cloudiness, and colors, as well as removes VOCs and other common chemicals from the water. Protect thin film membrane. 3rd stage – 75 GPD Membrane (TW-MEM-75): Reduce total dissolved solids and remove contaminants such as arsenic, lead, fluoride, chromium, radium, and much more. 4th stage - Post Carbon Filter (TW-CAB-TCR): Remove any possible residual and taste.