Pentair 230168 QuikCirc Light Gray 3-Head Concrete Circulation System - The key to help maintain pristine, clearer, and healthier pool water is an effective circulation system. The Pentair QuikCirc System works to aid in the improvement of the quality of your water, by evenly dispersing chemicals and treated water throughout your entire pool via targeted circulation. This system includes a 2-port 2” low profile valve, 3 G4 complete heads and risers and a plastic head removal tool.