CWR-DC6CT Countertop Imperial Double Filters, Ceramic VOC/THM This CWR-DC6CT Crown Basic Ceramic Counter Top water filters has an additional housing to remove volatile organic chemicals and THM or trihalomethane. According to the Collins English dictionary Trihalomethane Chemistry a type of chemical compound in which three of the hydrogen atoms in a methane molecule have been replaced by halogen atoms, esp by chlorine in drinking water. Trihalomethanes are thought to be carcinogenic. This dual water system thus reduces a wide range of contaminants including microbiological, chemical, chlorine, turbidity, heavy metals, bad taste and odor. The Crown Double Countertop Imperial Ceramic VOC/THM Filter has an added VOC/THM second cartridge. Volatile Organic Chemicals VOCs from industrial sources or chlorination by-products are adsorbed more effectively by coconut based activated carbon media. The filter is rated for chlorine reduction at 90% at 1ppm and VOC reduction 95% at 1ppm for up to 500 gallons. Replacement filters for this unit is the RF-IMPUC RF-CB5 The filter is a three-stage filtration system, with the first stage being Bentonite Kieselguhr ceramic that filters out parasites, bacteria, rust, dirt and sediment from the water. A small amount of silver baked into the ceramic inhibits the growth of bacteria. The second stage consists of of activated coconut shell carbon which reduces chlorine, chemicals, pesticides, bad taste and odors. Finally, the third stage is a heavy metal removing compound, which is incorporated in the carbon block called A.T.S. titanium zeolite that reduces lead and copper. Specifications The housing is made of medical grade-ABS plastic. Consider using this unit in conjunction with a fluoride, nitrate, or VOC upgrade for added protection. The flow rate of the ceramic filter is 1.5 gpm gallons per minute at 45 psi and the filter is effective up to 1,200 gallons. Supplied with diverter to connect to standard sink and This item ships from a separate warehouse and may require extra time for delivery.