Filter cartridge lasts 1500 gallons. This would be approximately one year for a family of four,
assuming they each drank 1/2 gal. a day and they wash fruits and vegetables in filtered water. Please note that it is actually more hazardous to use a dirty filter than to drink straight tap water. As the filters trap contaminants and slowly begin to clog the filtering system the water pressure will slowly begin to force through those contaminants, these water filtering companies therefore jhave you trapped. A Reverse Osmosis System will also have the same probelm as well as additionally wasting 3-4 times the amount of water used. IMO, a Water Distiller is the best answer so far, although this unit is simple, convenient and affordable. Does make one wish that our governement would at least start doing something positive. Unlike many brands, the whole system does not have to be thrown away. The housing is simply unscrewed, the old cartridge removed and a new one dropped in.
10 Stages of Protection Against Major Water Contaminants
U.S. Patent No. 6,197,193 B1
Stage 1- 100 micron sponge filter. Traps larger solids (sediments) such as RUST.
Stage 2- 8 oz. of KDF-55. KDF-55 is a patented alloy. It removes free Chlorine and some Heavy Metals, thereby prolonging the life of the filter and is an excellent Bacteriostat.
Stage 3-10 micron felt pad. Removes smaller floating solids and separates the layers, preserving their integrity.
Stage 4- 30 cubic inches of ultra fine mesh superior coconut shell Granulated Activated Carbon, ?G.A.C..? G.A.C. has long been accepted by the E.P.A. and others as the premier, cost-effective way to remove Chlorine, bad odor and color from drinking water. G.A.C. also removes Organic Contaminants such as Pesticides, Herbicides, Arsenic, Mercury and Trihalomethanes, a Cancer-causing Organic Pollutant.
Stage 5- 10 micron felt pad for Fine Sediment Removal.
Stage 6- 7 cubic inches of ion exchange resin.This resin has an exceptional affinity for Lead, and removes Lead to below minimum E.P.A. standards.
Stage 7- Additional 10 micron felt pad provides an extra buffer against Floating Sediment of any kind.
Stage 8- 7 cubic inch bed of G.A.C.. Provides extra protection against Cancer-causing Organic Pollutants.
Stage 9- 3 oz. of calcite. Calcite raises the water?s pH, which lowers acidity and increases alkalinity, which many nutritionists recommend.
Stage 10- 1 micron absolute depth filter. A filter with a micron rating this small screens outcysts and protozoa, (including Giardia and Cryptosporidium), and gives the filtered water a sparkling clarity.