Whether it’s for drinking, cooking, coffee, pets, plants, home, or office, Reverse Osmosis (RO) is the most convenient and effective method of water filtration. It filters water by squeezing it through a semi-permeable membrane, which is rated at 0.0001 micron (equal to 0.00000004 inch!). This is the technology used to make bottled water, it’s also the only technology capable of desalinating sea water. Non-RO water filters are much less effective, partly because the pore sizes on those filters are much bigger, generally 0.5 – 10 micron. They can filter out coarse particles, sediments, and elements only up to their micron rating, anything finer cannot be filtered out. As a result, water is far less clean and safe compared to reverse osmosis filtration. Our pre-filters are extruded solid carbon blocks. “Extruded block” means uniformly solid construction which prevents channeling or bypassing. Their superior material and construction offer greater absorptive and dirt holding capacity than other non-extruded carbon blocks or G.A.C. (granular activated carbon) filters. Most importantly, our carbon blocks do not release any carbon fines to clog up systems.