Choosing the correct nozzle for your pressure washer ensures effective cleaning without damaging surfaces. Consider these factors: Spray concentration: Test smaller nozzle openings on a durable surface to avoid damage. Adjustable nozzles: Lower psi pressure washers often have adjustable nozzles for various tasks. Color-coding system: Familiarize yourself with nozzle colors for different spray angles, such as black (65-degree) for detergent, white (40-degree) for delicate items, green (25-degree) for household cleaning, yellow (15-degree) for stains on concrete, and red (0-degree) for tough surfaces. Also, consider rotating nozzles or adjustable wands for versatility. Choosing the right pressure washer and nozzle ensures efficient cleaning and surface protection.