Pressure washer soap can be applied at low pressure with the use of a
downstream detergent injector and dual lance wand, or at high pressure with the use of an upstream detergent injector and single lance wand. Applying detergents at low pressure allows the soap to remain on the surface longer, resulting in a cleaner surface, saving you time and money. These brass soap nozzles offer a 25 degree spray pattern with large orifice sizes to drop the pressure on your power washer, creating a venturi that begins to draw detergent through the downstream chemical injector. Can also be used to apply acids at low pressure for a two step cleaning process.