What is a Carbon Block Water Filter?Ī solid carbon block water filter is just that, a block of finely ground and compressed carbon that water passes through during filtration. One of the additional benefits of this process of filtration is that healthy minerals remain in your water, so you’ll get the most out of every sip. The filter also physically removes sediment and other larger contaminants.īecause activated carbon is highly effective and relatively inexpensive, it is a very popular filter type on the market today.
These contaminant molecules bond with the carbon, and clean drinking water flows through the other side of the filter and into your pitcher. In scientific terms, the positive ionic charges in the carbon attract the negative ionic charges of contaminant particles. During adsorption, molecules of contaminants are attracted to the molecular structure and large surface area of the carbon. When drinking water passes through this type of filter, a process called adsorption happens.
What is an Activated Carbon Water Filter?Īctivated carbon is a highly porous material that has a microscopic graphite lattice structure. We’ll discuss what these filters are, what they do, and how they stack up against other water filters. Therefore, it may be safer to replace the filter more often than recommended by the manufacturer.Have you been shopping around for the right filter for your drinking water? In this article, we’ll spotlight one popular water filtration solution: carbon block filters. Tests done by Rodale Press Product Testing Department indicated that filter performance was reduced significantly after 75 percent of the manufacturer’s recommended lifetime. Some manufacturers state a recommended water treatment capacity in gallons, beyond which the AC should be replaced. Replacement intervals should be determined based on daily water flow through the filter and the contaminant being removed. The unit is attached to the cold water pipe and provides drinking and cooking water, with the regular tap providing untreated water for non-consumptive use.Ĭarbon cartridges must be replaced regularly. In the line-bypass system, a separate faucet is installed at the sink.
If hot and cold water are blended, the treated cold water mixes with the untreated hot water. In this situation, only the cold water can be considered to be treated. Both pour-through and faucet-mounted units are inexpensive and simple, but will treat only limited quantities of water at a time and are not as effective as other devices because contact time is limited due to the small amounts of carbon contained in the units.Īn in-line device is installed beneath the kitchen sink in the cold water supply line. This type can have a bypass valve that allows selective filtering. Faucet-mounted devices are attached to the faucet or set on the counter with connections to the faucet. These units aren’t connected to the water supply. Water is simply poured through the carbon and collected in a container. Pour-through models (such as pitchers with a filter) are the simplest type of AC filter. AC filters will not remove microbial contaminants (such as bacteria and viruses), nitrate, fluoride, hard water minerals, and many other compounds.ĪC filters are most often pour-through, faucet-mounted, in-line, or line-bypass. In addition, specialized AC filtration can absorb heavy metals such as lead. Some also can remove or reduce organic chemicals such as benzene, chlorobenzenes, carbon tetrachloride, and methylene chloride. Some AC filtration can remove many harmless taste and odor-producing compounds in water. Different types of carbon filters remove different contaminants. Activated carbon (AC) filters are becoming popular for treatment of water used for cooking and drinking.
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