A grease trap (also known as grease interceptor, grease recovery device, greasecapsule and grease converter) is a plumbing device (a type of trap) designed to intercept most greases and solids before they enter a wastewater disposal system.
An oil filter is a filter designed to remove contaminants from engine oil, transmission oil, lubricating oil, or hydraulic oil. … Oil filters are used in many different types of hydraulic machinery.