Grease Trap Cleaning Services

Grease trap cleaning is the process of removing accumulated fats, oils, and grease (FOG) from grease interceptors — specialized plumbing devices that prevent FOG from entering the septic system or municipal sewer. While most commonly associated with restaurants and commercial kitchens, residential grease traps are increasingly common and require regular maintenance.

Grease traps work by slowing down the flow of warm, greasy water through a series of baffles, allowing the grease to cool, solidify, and float to the surface while heavier food particles settle to the bottom. Clean water flows out from the middle layer. Over time, the accumulated grease and solids reduce the trap's effective volume and filtering capacity, eventually allowing grease to pass through to the septic system or sewer.

For residential properties with septic systems, grease buildup in the tank can be particularly damaging. Grease forms a thick scum layer that doesn't break down easily and can clog the outlet baffle, allowing untreated waste to flow directly to the drain field. A residential grease trap, typically located under the kitchen sink, should be cleaned every 1 to 3 months depending on cooking volume.

Commercial grease traps must typically be cleaned every 1 to 3 months, depending on the volume of food preparation and local regulations. Many municipalities and health departments mandate specific cleaning frequencies and require businesses to maintain cleaning logs. Failure to comply can result in fines, sewer surcharges, or even temporary closure.

Professional grease trap cleaning involves pumping out the accumulated FOG and solids, scraping the baffles and walls, inspecting the trap for damage or wear, and properly disposing of the waste at a licensed facility. Residential cleaning costs $100 to $250 per visit, while commercial trap cleaning ranges from $200 to $800 depending on trap size and accessibility. Larger in-ground interceptors at high-volume restaurants can cost $500 to $2,000 per service.