A grease trap (or grease interceptor) is a plumbing device in commercial kitchens designed to capture fats, oils, and grease (FOG) before they enter the wastewater system. However, when a grease trap isn’t cleaned or maintained regularly—typically every 30 to 90 days depending on usage—the accumulated grease and solids can harden, block flow, cause raw sewage backups, and release rancid odors into the kitchen. . #montana #realestate #homeinspection #406 #commercialproperty | Inspect Montana, LLC