The Watts WQCCC13 13 Kwik-Change Replacement Carbon Block Prefilter is a 1/4 turn quick change replacement filter for the WQC4RO13 RO system and the WQCFU-T-13 Ultrafiltration system. Changing the filter is quick and easy requiring no tools. We also have Watts filter packs available, they’re an excellent value if you want to change all of your filters together.

Twist to remove.