The Watts WQTCBC-10 QT Quick Twist Replacement Carbon Block Prefilter is a quick twist replacement filter for the WQT4RO11-50 reverse osmosis system. Changing the filter is quick and easy requiring no tools. It is recommended that you replace this filter every 6 months. Reduces chlorine taste and odor Quick Twist filter is easy to replace; requires no tools.

Also known as WQCCBC10-W For use with the following system: Watts WQT4RO11-50 QT Quick Twist Reverse Osmosis System 50 gpd