Without disconnecting hoses, coolant is easily changed by inserting a conical adapter into reservoir tank. The coolant exchange job can be done by deep vacuum within 5 minutes, instead of half hour taken in hose disconnecting and restoring job. Also, this vacuum exchange process can avoid air pockets to save air purge time after coolant exchange. The oil receiving pan is optional, for some vehicle that do not have straightin reservoir tank design (can not utilize conical adapter to do coolant exchange through reservoir tank) , thus coolant exchange by gravity can be effected. The machine is not only efficient and time saving equipment, but also helps keep your garage floor clean, avoid ground pollution caused by coolant dripping during hose disconnecting job caused by other coolant exchange methods. Features Dualmanual valve design, easy operation Directly connect shop air, zero failure Whole work process visible through fiber glass tanks Support off/onvehicle exchange Full c