How to Clean and Maintain Your Kitchen Grease Trap

Grease traps act as the frontline defense for your kitchen plumbing, stopping fats, oils, and greases from turning into rock-hard blockages deep in your pipes. When left unmaintained, these interceptors become a breeding ground for foul odors and a ticking time bomb for a total kitchen sink backup. Maintaining a grease trap is undeniably messy work, but it is the most effective way to prevent a plumbing emergency. Success here means consistent scheduling and a commitment to keeping non-grease waste—like coffee grounds or food scraps—out of your drains entirely. Done right, your system will flow freely for years.

1. Cool It Down First. Wait for the grease trap to cool down for several hours before starting. Cleaning a hot trap causes liquefied grease to flow into your pipes, which defeats the entire purpose of the maintenance.
2. Access Your Trap. Carefully pry the grease trap lid off using a flat-head screwdriver or a pry bar. Take note of the gasket's condition; if it looks brittle or cracked, have a replacement ready to install.
3. Remove Congealed Grease. Use a heavy-duty plastic scoop or a small bucket to remove the top layer of hardened grease and the bottom layer of sediment. Deposit the waste directly into a heavy-duty trash bag.
4. Scrub Every Surface. Use a stiff-bristle scrub brush and a concentrated mixture of hot water and grease-cutting dish soap to clean the walls and baffle of the trap. Agitate the surface thoroughly to remove any lingering residue.
5. Verify Pipes Are Clear. Inspect the inlet and outlet baffles to ensure they are clear of obstructions. Use a plumbing snake if you see evidence of a clog extending into the piping.
6. Seal and Test. Clean the edges of the trap where the gasket sits to ensure a tight seal. Replace the lid, ensuring the gasket is seated correctly, and tighten any locking bolts firmly.