Grease trap cleaning

Indoor traps vs outdoor interceptors

Small under-sink traps are usually cleaned often, sometimes by staff. Large in-ground interceptors are pumped by a licensed hauler with a vacuum truck.

How often

It depends on the trap's size and how much grease your kitchen produces. Many local sewer authorities use a 25% rule — pump when grease and solids fill a quarter of the trap — and some set fixed schedules and require pumping records. Check with your city or wastewater utility.

What to ask

• Do you pump the whole trap, not just skim the top?
• Do you provide a service manifest or pumping record?
• Where is the grease disposed of?
• Can you set up a recurring schedule?