I put it in a Karcher K7 and it doesn't work. After 2-3 seconds, the pump stops and starts again. I don't know what could be wrong. It works fine with the foam sprayer. The machine has a water supply of 3/4 with over 1000 liters per hour. As for construction, it is quite good for its price. If someone else has tried it, please write in the comments. 23/7 The gun is fine, but it cannot work with high pressure because it has small nozzles. I put Karcher nozzles and it works fine.