How to Clean a Grease Trap: A Simple Step-by-Step Guide

Whether you run a commercial kitchen or just want to keep your home plumbing in good shape, cleaning your grease trap is essential. Over time, fats, oils, and grease (known as FOG) can build up, causing clogs, foul smells, and even plumbing damage.
This step-by-step guide will walk you through how to clean a grease trap safely and effectively.
What You’ll Need:
Rubber gloves
Face mask (optional but recommended)
Scoop or small bucket
Scraper or putty knife
Cleaning brush or sponge
Dish soap or degreaser
Trash bags
Step-by-Step: Cleaning a Grease Trap
1. Turn Off the Water
Before you begin, ensure no water is running in the sink or dishwasher. Let the trap cool if it has been in use recently.
2. Remove the Lid
Carefully take off the grease trap lid. You may need a wrench depending on the type of trap. Be prepared for a strong odor.
3. Scoop Out Grease and Sludge
Use a scoop or bucket to remove the solidified grease and any sludge from the trap. Dispose of it in a trash bag—do not pour it down the drain.
4. Scrape and Clean the Interior
Using a scraper or brush, scrub the sides and internal parts of the trap, including the baffles, to remove buildup.
5. Wash and Rinse
Mix warm water with dish soap or a degreaser, and thoroughly clean all surfaces inside the trap. Rinse well with clean water.
6. Reassemble and Test
Put the lid back on securely. Run hot water through the sink for a few minutes to make sure everything is flowing properly.
How Often Should You Clean It?
The frequency depends on how much grease goes down your drains:
Commercial kitchens: Every 1 to 3 months
Home kitchens: Every 4 to 6 months
Skipping routine cleanings can lead to clogged pipes, foul odors, or even health code violations for businesses.