Swimming Pool Water System Management Control Unit 1- Installation: It is installed on top of the filter using a central clamp consisting of two arms with an easy-to-install gasket. It includes a pressure gauge, three pipe connection points (pool line, pump connection, and drain line), a bottom connection for the filter's main pipe (50 mm), and three pipe connections with 1.5 mm threaded heads. 2- Usage: It allows five operations that are controlled by the arm (water circulation - filtration - rinsing - filter washing - pool water drainage)