Replacement Tubing The Aquaclean system is designed to reduce the maintenance and cost in manufacturing pure water. Pretreament cartridge, Reverse Osmosis and a De-lonization. We have created the ultimate system that requires the least filter replacement than anything else on the market. Step 1: Tap water flows into Carbon/KDF prefilter to begin the anti-scaling process and remove chlorine in the water supply. Step 2: The reverse Osmosis Membranes separate water and remove 92% to 95% of total dissolved solids. Step 3: The De-lonization cartridge removes the remaining total dissolved solids, producing water that is 99.99% pure.