The coolant system stepped adaptor, enables thorough flushing of debris and contaminants from the cooling system during repair and maintenance. Wide nozzle adaptor uses air and water to form a powerful jet washer, which cleans or dries (air only). Air and water controls using a trigger for adjusting air pressure, and a lever for adjusting the water flow. Durable hard-wearing Acetal plastic. Can be used in many other applications when a water system requires cleaning or unblocking. Standard garden hose connector with swivel feature. Operating pressure: 87-145 psi/6-10 bar.