Culligan has discontinued the Culligan CT-3 system, the Culligan CT-3R replacement water filter, and the Culligan CT-2R replacement water filter. We have been unable to find an interchangeable replacement filter from any manufacturer due to the unique size and shape of the filter. We recommend purchasing a new countertop system that uses standard 10" L x 2.5" W filters. Many manufacturers make the 10" x 2.5" standard size filters so we will always have replacement filters available.
The countertop system that looks similar to the Culligan CT-3 is the CTW-10-WF
. To see our entire countertop system selection, go to our Countertop Filter Systems Page