The Grundfos TPED 150-160/4-S-A-F-A-GQQE is a three phase, twin head in-line circulator pump with variable speed controller with 150mm flanged connections. The Grundfos TPED are a range of twin-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 TPED pump has two reliable, high-efficiency, IE3-rated motors and are electro-coated to prevent corrosion. Note: A Grundfos GO controller is required to commission these pumps.