Grease Trap Maintenance for Restaurants: A Guide

A neglected grease trap can back up plumbing, trigger costly municipal fines, and even force a temporary kitchen shutdown, making regular maintenance a basic cost of doing business.

Why Grease Traps Require Regular Service

Grease traps fill with fats, oils, and solids over time, and most municipalities require pumping once the trap reaches 25% capacity to remain effective.

Pump when the trap reaches roughly 25% capacity
Follow local municipal service frequency requirements
Keep pumping records on file for inspections
Train staff on proper drain disposal practices

Signs of an Overdue Grease Trap

Slow drains, sewage odors near the trap, and backups in nearby fixtures are all warning signs that pumping is overdue.

Interior vs. Exterior Trap Considerations

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Grease Trap Service Frequency Guidelines

Trap Type	Typical Frequency	Trigger
Interior under-sink	Monthly to quarterly	25% capacity rule
Exterior in-ground	Quarterly to semi-annually	25% capacity rule
High-volume kitchens	Monthly	Faster grease accumulation

Frequently Asked Questions

How often does a restaurant grease trap need to be pumped?

Frequency depends on trap size and cooking volume, but most municipalities require service once the trap reaches about 25% capacity, often monthly to quarterly.

What happens if a grease trap is not maintained?

Overdue traps can cause plumbing backups, sewage odors, municipal fines, and in severe cases forced closure until the issue is resolved.

Can restaurant staff clean a grease trap themselves?

Small interior traps can sometimes be serviced in-house, but most municipalities require licensed haulers for proper disposal and documentation.

Are grease trap service records required for inspections?

Yes, most health and plumbing inspectors require documented proof of regular pumping to confirm compliance with local grease management ordinances.