Operator simply fills Zebra Muscle''s drum with 12 gal of coolant, connects inlet hose to pump, places pump in coolant, and secures clean coolant discharge hose from pump to drum. Skimmer will then aerate, filter, and separate coolant from tramp oil so coolant lasts longer. Spinwelded fittings ensure that skimmer is leakproof. Maintenance is low, and there are no foul odors or coolant rancidity.