A flat jet nozzle is an attachment for a pressure washer that shapes the water jet into a flat fan pattern. This spray pattern is suitable for cleaning larger flat surfaces, such as facades, terraces, paving, or vehicles. The main parameter of this nozzle is the spray angle, which is given in degrees. A smaller angle, for example 15 degrees, creates a narrow and powerful water jet, which is effective for removing stubborn dirt from hard materials. Conversely, a wider angle, for example 40 degrees, creates a wide and gentler jet, which is kinder to delicate surfaces and allows for faster cleaning of large areas.