Double Countertop with KDF/GAC and Carbon Block. CTD-CB - Designed for municipal water that contains a high level of chloramines (chlorine combined with ammonia) MTBE, VOCs (volatile organic chemicals), PPCPs. Both of these contaminants require more carbon for greater contact time. This twin housing countertop water filter features our KDF/GAC cartridge PLUS a high performance 0.5 micron extruded carbon block cartridge (specs below) in the second housing (this technology is recommended in Dr. Andrew Weil's book, Eight Weeks to Optimum Health). The carbon block cartridge is made from a high grade coconut shell carbon that has a high capacity for chlorine, lead, chloramines, VOC, MTBE and cyst removal. A heavy-duty ball valve-style diverter valve replaces the aerator on your faucet. In the regular position, water exits straight through its own aerator. When filtered water is desired, turn on the cold water and simply rotate the valve knob - water is routed through the filter and out its own swivel spout. Great for apartments, dorms, RV's or travel. Spout, diverter valve, and connectors are lead-free chromed brass - NSF-approved. It can be later converted for under-counter use with part number FK, Faucet Kit ($49.00) - see bottom of this page. Includes three diverter adapters, housing wrench, and chlorine test strips to verify when it's time to replace cartridge. 12" high, 5" deep, 11" wide. 3 year prorated warranty on KDF/GAC cartridge, 5 year on components. Download Spec Sheet for Carbon Block Cartridge (161 KB)Installation Manual Compare At - $219.00, OUR PRICE - $139