Designed for 2.2 – 5.5 GPM pressure washers, the Blue Mule Power Wash Foam-All is a machined stainless steel venturi system that quick connects to the trigger gun of a pressure washer. This rugged system draws chemical concentrate from any container, dilutes the concentrate to the required ratio and applies the solution to any surface as a wet, clinging foam. These hose end systems can apply more aggressive chemicals since no chemical passes through the pressure washer pump, hose or trigger gun. Metering tips provide for up to 21 dilution ratios. For use wherever a pressure washer is needed, such as for cleaning building rooftops, vehicles, equipment or concrete. The Power Wash Foam-All will provide a foam throw of up to 25 feet using a 4 GPM pressure washer (distance varies based on volume).