Yellow high-pressure (15-degree) quick-connect nozzles are best used for heavy-duty cleaning, stripping paint, and removing stubborn dirt, mold, or mildew from hard surfaces like concrete, brick, and metal.They provide a concentrated, fan-shaped spray perfect for preparing surfaces for paint or cleaning industrial equipment. Best Use Cases for Yellow (15°) Nozzles: Concrete & Driveways: Removing oil stains, rust, and ground-in dirt. Surface Preparation: Stripping loose paint or peeling wood. Heavy Duty Cleaning: Blasting mud off tractors, farm equipment, or construction gear. Brick and Masonry: Cleaning stubborn grime off hard masonry. Key Considerations: Surface Safety: They are too intense for soft wood, siding, or vehicle paint, as the 15-degree concentrated spray can cause damage. Position: They are less concentrated than red 0 degree nozzles, offering a balance of high impact and moderate cleaning coverage. Usage: They fit into standard