The Grundfos TPE 50-290/2-A-F-A-BAQE is a three phase, single head in-line circulator pump with integrated variable speed controller with 50mm flanged connections. The Grundfos TPE are a range of single-head, vertical in-line pumps with integrated varable speed controllers, commonly used as heating circulator pumps in commercial building services, industrial processes and water supply. Each TPE pump has a reliable, high-efficiency, IE3-rated motor and are electro-coated to prevent corrosion. Note: A Grundfos GO controller is required to commission these pumps.