Draining machines are used to efficiently remove used fluids like engine oil, transmission fluid, and brake fluid from vehicles (cars, motorcycles, ATVs) by vacuum or pressure, often via the dipstick tube, avoiding messy drain plugs. They're also used in the food industry to de-oil fried snacks (chips, nuggets) using centrifugal force or vibration to make them healthier and improve shelf life. Some extractors work with compressed air (pneumatic), while others are manual or electric, designed for easy collection