Watts Kwik-Change 13″ GAC Post-Filter Replacement Cartridge (Blue)



  (1) 13" Kwik-Change GAC Post-Filter
  If you purchased your system from Costco, the filters you need are the 11" Kwik Change Filters.

The Watts WQCGAC13 Kwik-Change GAC Carbon Postfilter is a 1/4 turn quick change replacement filter for the WQC4RO13 RO system. Changing the filter is quick and easy, requiring no tools. It is recommended that you replace this filter every 12 months.


  • 13" Replacement Cartridge
  • Removes Dirt, Rust & Sediment
  • Granulated Activated Carbon filters (GAC) effectively reduce chlorine, taste and odor problems with your water

Easy Cartridge Replacement

Watts Replacement Cartridges Guide

Additional information

Cartridge Size