From Amazon
Kärcher 18 V Barrel Pump BP 2.000-18, Water Pressure: 2 bar, Flow Rate: 2,000 l/h, Immersion Depth: 1.8 m, delivery Height: max. 20 m, can be Used with The Kärcher 18v Battery, Available Separately
Conrad Electronic
Kaercher Home & Garden BP 2.000-18 1.645-475.0 Barrel pump 2000 l/h 20 m