CuZn’s Reverse Osmosis Water Filtration System is your classic RO with all the bells and whistles for an unbelievable price. If you have your heart set on an RO system, you will not be disappointed! As a matter of fact, CuZn guarantees satisfaction and backs this system with a full 1 year warranty and 90 Day Money Back Guarantee. Reverse Osmosis Water Filtration Systems without a doubt remove the greatest variety of contaminants at the highest possible percentage when compared to any other type of residential water treatment system. The highly advanced Reverse Osmosis Filtration Process will also strip the water of TDS (Minerals/Electrolytes – Calcium, Magnesium, Potassium, Chloride). If your water is too Hard (contains too high mineral content for practical use), The CuZn 5 Stage RO System will soften the water in addition to purifying the water and is the right fit for you. Want to purify your water but allow the health beneficial TDS (Minerals/Electrolytes) to remain in the filtered water? Check out CuZn’s UC-200 Under Counter Water Filtration System. The UC-200 Under Counter Water Filter (while offering more basic purification than the CuZn 5 Stage RO) is much easier to install, requires less maintenance & purifies without removing the TDS/Minerals! An added bonus is the UC-200 is still 100% Made in USA. BREAK DOWN OF ALL 5 CuZn RO PURIFICATION STAGES: Stage 1 – Sediment Filtration Cartridge. Stage 2 – Carbon Block 5 Micron Filtration Cartridge. Stage 3 – Carbon Block 5 Micron Filtration. Stage 4 – 50GPD Reverse Osmosis Membrane (0.0001 Micron Filtration!). Stage 5 – Post RO Membrane Inline Carbon Filter for Taste & Odor Polishing. Questions? Call CuZn’s Award Winning Customer Support Team at 800.345.PURE(7873), Phone Support: 8am – 5:30pm est, M-F