Grundfos SP1A-9 4' Submersible Borehole Pump with 240V 1Ph 50Hz, 0.37kW direct coupled 2900rpm electric motor. As standard, all Grundfos SP models are made entirely of stainless steel DIN W.-Nr. 1.4301 (AISI 304). Where particularly aggressive liquids are encountered, the SP borehole pumps are available in extra high grade stainless steel DIN W.-Nr. 1.4401 (AISI 316), or, for severe conditions, DIN W.-Nr. 1.4539 (AISI 904 L). Please note: The range of SP Single Phase pumps must be installed with an SA-SP M2 control box to protect the warranty. When purchasing both pump and control box, further discount is available. ALL PUMPS ARE SUPPLIED WITH 2 YEAR WARRANTY.