The Rule-Mate 750 Automatic Bilge Pump, Original Code Rule Rm800B, Is Equipped With An Electronic Sensor That Starts It When The Water Reaches 5 Cm And Automatically Stops When The Water Is Completely Drained. This Sensor Is Defined As A Field Effect, That Is, It Does Not Start The Pump If Oil Is Present, Thus Respecting The Enironment. - Flow Rate: 51 Liters/Min - 19 mm Outlets