... working voltage,environment protection,no vibration, no waste,ect. 38-16 DC solar water pumpFeature:1. Life: Expected life span is ... , overheat protection, run-dry protection,over current protection, signal feedback, speed control, ect.All the functions are custormized according to your ... OD(mm)Outlet OD(mm)Remarks38-1694*42*76M22M22 38-16 DC solar water pump