What is the difference between R/O System
(low pressure) permeate and Kold Ster-il® Filtrate?

Low pressure R/O System is called NanoFiltration and high pressure R/O Systems is called HyperFiltration [which require 225 psi @ 77 F and a 2000mg/L concentration of a solute] (i.e. copper sulfate) to deliver 98% rejection. Which leaves 2% of 2000mg/L or 40mg/L concentration of a toxic metal. The low pressure systems instead deliver between 94-98% removal of total dissolved solids or the mineral content of feedwater. The low pressure R/O System is not capable 96% rejection of a specific compound even at the 2000mg/L solute concentration. This is due to the lower operating pressure, type of membrane, membrane charge and membrane pore size. Basically the low pressure R/O System or NanoFiltration functions as a softening membrane passing low amounts of clean water as permeate and producing large amounts of waste water. This NanoFiltration cannot reject VOC's, low levels of heavy metals, Organic Carbons, Pesticides/Insecticides, Poly and complex Phosphates, Water Conditioning Polymers. The low grade carbon and string would cartridge filters are prefilters for the membrane only ---- they are not ANSI/NSF Certified. Low TDS (total dissolved solids) numbers i.e. 30µ/S Conductivity doesn't mean that the water is pollutant free ---- only low in minerals. In fact R/O water could contain high levels of pesticides, volatile organic chemicals, complexed phosphates and dangerous Coliform bacteria while still showing 35-45µ/S TDS Conductivity reading. The Kold Ster-il® uses three separate stages to sorb heavy metals, VOC's, TOC's, Total Phosphates, fungus, algae, diatoms, particulates, Giardia, Cryptosporidium, bacteria, endotoxins, pyrogens, biopolymers, charged water conditioning polymers, Chlorine, Odor, Taste, VOC's, Pesticides/Insecticides, particulates, Giardia, Cryptosporidium, heavy metals to meet U.S.A., Canada, E.E.C., Japan Standards. The Kold Ster-il® doesn't remove calcium, magnesium divalent cations nor strip the water's alkaline reserve. People, animals, reptiles, birds, marinefish & invertebrates and African Cichlids benefit from very high quality water with the minerals and buffering capacity remaining in the filtrate. In addition, our Kold Ster-il's filtrate meets or exceeds ANSI/NSF Potable Water & FDA Bottled Water Quality Standards. Actually, our Kold Ster-il® has passed the more stringent Japanese Water Quality Standards and is certified to produce 14.0 liters per minute of potable water for usage in Japan.