Grundfos Hydro Multi-S booster sets consist of two or three identical Grundfos CM, CMV or CR pumps, connected in parallel and mounted on a common base frame, and a control cabinet with motor protection and integrated controller. Hydro Multi-S booster sets are supplied as complete, pre-assembled and tested systems including suction and discharge manifolds, isolating valves, non-return valves, pressure gauge and pressure switches.