The karcher sp3 submersible dirty water pump is the entry level dirty water pump from karcher capable of moving 7000lh from areas such as ponds pools and flooded areas the sp3 can be submerged in either clean or dirty water up to a depth of 7m and can easily deal with dirt particles with a circumference of up to 20mm the unit is not suitable for constant use in fish ponds or water features specification input power 350 watt delivery capacity max 7000 lh immersion depth 7m max particle size 20mm