ZeroWater ZD013 Filtration Pitcher with Electronic Tester ZeroWater ZD013 Filtration Pitcher with Electronic Tester. With the ZeroWater Pitcher you can get cleaner, fresher water without tapping into your plumbing line, using bulky water coolers, and wasting your money on expensive bottled water. Thanks to an innovative five stage filtration process, the ZeroWater Pitcher offers more complete water filtration than ordinary carbon filters. And for convenience, this pitcher neatly stores right in your refrigerator door. Even if you live in a municipality that cleans or treats water, water can pick up chemicals on its way from the treatment plant to your faucet, giving your tap water a metallic or chlorinated taste. Water that is purified with a ZeroWater Pitcher, however, tastes the way water should, crisp, clean, and fresh. Tested and certified by the Water Quality Association and NSF International for removal of several minerals, ZeroWater is the only filtration system that fits the FDA definition of purified bottled water. And at a fraction of the cost of ordinary carbon filters. The ZeroWater pitcher not only improves the taste of your tap water, it also helps to improve the environment. When you use the ZeroWater Pitcher, you will reduce your use of plastic water bottles that clog up landfills and harm ecosystems. You will also contribute to water conservation, because unlike reverse osmosis systems, ZeroWater is gravity operated and does not waste electricity or water. At the heart of every drop of water that is purified by a ZeroWater Pitcher is an independent, laboratory calibrated water tester called a TDS meter. TDS stands for Total Dissolved Solids and represents the amount of dissolved substances that can negatively affect the way water tastes. Unlike conventional gravity fed or carbon water filters that remove only certain substances from your water, ZeroWaters patented Ion Exchange System with Five Stage Technol