GREASE TRAP REPAIR Grease Trap Repair Learning About Commercial Grease Traps For Restaurants. The grease trap is a major component of a commercial kitchen that will deter grease and food solids waste going into the sewer line. A faulty or a leaky grease trap can cause the plumbing to back up and spill all over causing a hazardous mess on the floor. It is often recommended that when these units...