The Kärcher SP 11,000 Clean & Dirty Water Pump is an extremely powerful submersible pump is ideal for draining garden ponds and emptying water butts. The Dirt Level Sensor starts immediately upon contact with water and is individually adjustable to suit your needs. Save time by conveniently changing the automatic/ manual switch to continuous operation. This pump can reliably pump water down to a residual water level of 25 millimetres – both in continuous operation and in automatic mode, when the level sensor is set accordingly.