The Fill Star Water Level Control System is easy to install and provides overflow protection with adjustable presets. It uses the same lid and collar size as AquaStar skimmers and includes a 2" to 1-1/2" PVC bushing and a ¾" PVC plug (if overflow is not required). Features a ¾" PVC water supply inlet. The float valve is made from high-strength engineered resin, with an injection-molded float and pre-molded ½" MPT float thread. No transition glue is needed.