Bypass Valve, K4-k5 Karcher 9.002-164.0 Spare Part For Mini Washers, Accessories For Mini Washers, Accessories And Spare Parts - Pressure Washer Parts & Accessories - AliExpress
K5 Unloader valve assembly
Kärcher Spare part set control head 9.001-800.0 for K4, K5 | 9.001-800.0 - Kärcher Store Schreiber
Bypass Valve, K4-k5 Karcher 9.002-164.0 Spare Part For Mini Washers, Accessories For Mini Washers, Accessories And Spare Parts - Pressure Washer Parts & Accessories - AliExpress