Grundfos 25-SQF-3 Flex Solar Water Pump The SQFlex system is equipped with the SQF submersible pump. Very flexible as to its energy supply and performance, the SQFlex system can be combined and adapted to any need according to the conditions at the installation site. The system components are: SQF submersible pump CU 200 control unit IO 100 and IO 101 switch boxes IO 102 breaker box Energy supply: solar panels wind turbine generator batteries Model TDH Range (Ft.) Nominal GPM Length (In.) Output Size Pump Type 3 SQF-2 120 - 390 3 47 1" NPT Helical Rotor 6 SQF-2 120 - 390 6 48 1" NPT Helical Rotor 11 SQF-2 40 - 300 11 49 1 1/4" NPT Helical Rotor 25 SQF-3 0 - 40 25 33 1 1/2" NPT Centrifugal 25 SQF-6 0 - 60 25 35 1 1/2" NPT Centrifugal 40 SQF-3 0 - 20 40 37 2" NPT Centrifugal 75 SQF-3 0 - 40 75 39 2" NPT Centrifugal Water, Wherever, Whatever With the advances in pump technology over recent years, areas that would previously have been considered uninhabitable or not supportive of life have become viable and attractive. With the new SQFlex system, Grundfos can consolidate these areas and pioneer further into new territories: Consolidating by upgrading older unreliable pump technology, and pioneering by providing more stable and low-maintenance pumping solutions in even more remote areas