The Blue Mule Ultimate Wash System 2.5 is a LOW VOLUME wash system for diluting and applying 1 or 2 chemicals as foam or spray, and for rinsing. This venturi injection system draws concentrated chemical from any sized container, mixes it with water and projects the accurately diluted solution through the discharge hose. Use the ball valves to switch between products or dilution ratios and simply close the chemical ball valve and open the rinse valve to spray fresh water. Use the foam nozzle to apply wet, clinging foam or remove the nozzle and spray chemical and rinse using only the garden hose gun. This heavy-duty and easy-to-use system will outperform and outlast the competition through superior design and materials.