When you purchased your pressure washer you will have found that it came with 3-4 color-coded nozzle tips, where a pressure washer uses the quick connect system it’s normal to get up to around 5 tips.
The 0-degree (red) -- shoots a high-pressure direct jet of water onto the surface. When this jet hits the surface, it’s contained to the area roughly the size of a quarter coin. It does not sheet or fans out the water spray at all. The 15-degree (yellow) -- creates a 15-degree wide fan spray of water. Because the water is spread over a wider area, the force produced on the surface is reduced. The 25-degree (green) -- is an even larger sheet of water than the 15-degree nozzle so even less pressure is applied to the surface The 40-degree (white) -- is the most gentle tip. Held at the right distance, you would use the 40-degree nozzle to clean windows and other fragile items. The 65-degree Soap (black) -- is a top specially designed to work with pressure washer detergents and soaps, it ensures they foam up. Turbo/Rotary Nozzle -- Think of the red nozzle + green nozzle with rotational force. Adjustable/Variable Nozzle -- this is common in Karcher’s, Nilfisks, etc, It’s 5 nozzles in one usually, and with a quick twist, you can adjust the spray pattern without stopping.