Grease Trap Cleaning in Knoxville, TN — Restaurant & Commercial Service

Why Regular Grease Trap Maintenance Matters

Every commercial kitchen in Knoxville is required to have a grease interceptor (commonly called a "grease trap") between its drains and the city sewer system. The trap separates fats, oils, and grease (FOG) from wastewater so they don't enter the public sewer — where they cause blockages, overflows, and environmental problems.

When a grease trap isn't maintained, three things happen, all bad:

• Kitchen drains start backing up. Once the trap is full, grease pushes back up through the drains it's supposed to capture from. A backed-up three-compartment sink at 6pm on a Friday is a service-stopping problem.
• Health code citations. Knox County Health Department inspectors check grease traps as part of routine inspections. A trap that's overfull, malfunctioning, or missing service manifests is a documented violation.
• KUB sewer overcharges and fines. When grease escapes a poorly maintained trap and contributes to a city sewer blockage, Knoxville Utilities Board can assess fines and pass along cleanup costs. We've seen single incidents cost restaurants thousands of dollars.

How Often Grease Traps Need Cleaning

The technical answer is "when grease and solids reach 25% of trap capacity" — the so-called 25% rule. In practice, that translates to different intervals depending on your operation:

• High-volume restaurants (fryers, heavy meats, late hours): typically every 30 days
• Standard full-service restaurants: typically every 30–60 days
• Cafés, coffee shops, light food service: typically every 60–90 days
• Schools, daycares, small commercial kitchens: typically every 90 days or as needed

The right schedule for your kitchen depends on the size of your trap, what you cook, your daily volume, and what your local health inspector expects. We'll assess on the first service call and recommend a schedule that's compliant without being more frequent than you need.

Our Grease Trap Cleaning Process

1. Inspect first. We open the trap, measure grease and solids levels, and check for any issues — broken baffles, missing inlets, hidden problems that could cause a backup even after cleaning.
2. Pump and scrape. We remove all contents — water, grease layer, and settled solids — using a vacuum truck. The trap is then scraped clean of caked-on grease that doesn't come out with pumping alone.
3. Inspect the trap interior. With the trap empty, we visually inspect the walls, baffles, inlet, and outlet for damage or signs of trouble. We'll let you know if anything needs attention before it becomes a problem.
4. Refill with water. A grease trap doesn't work empty — it needs a baseline water level to function. We refill before leaving.
5. Hand you the manifest. Every service comes with a signed manifest documenting date, technician, volume removed, and disposal facility. You file it with your health department records.

Combining Trap Service With Line Cleaning

For some commercial kitchens, the trap is only part of the story. Discharge lines from the trap to the city sewer can themselves accumulate grease buildup over years — especially in older buildings or where the line pitch is shallow. If your discharge line is causing backups even with a recently cleaned trap, hydro jetting the line is usually the next step. Many commercial accounts schedule trap service every 60 days with annual line jetting as preventive maintenance.