Identical to the TRK (ceramic) drip filter, except uses the new Gravidyn combination ceramic and carbon filter elements ( three filter elements per unit). Works on gravity pressure from upper compartment; no hookup required. Raw water is filled on top with up to 2-1/2 gallons of untreated water and slowly drips through the three elements into the bottom container. Flow rate of approximately 1.0 gallons per hour. Filter element life is approximately six months (until the carbon is saturated). Size is 11" x 26", weighs 8 pounds

Added Carbon filtration improves water taste.