Your Grease Trap Gasket: When It Fails and How to Replace It
The gasket is the rubber or silicone seal between the grease trap lid and the body. It is a small part, but when it fails, you get grease leaks on your kitchen floor, sewer odours in your restaurant, and a failed municipality inspection. Replacing a gasket is a 30-minute job that prevents all of that.
What the Gasket Does
The gasket creates an airtight and watertight seal around the trap lid. It keeps three things contained:
- Grease and wastewater — prevents spills when the trap is full or during high-flow periods
- Sewer gas — hydrogen sulphide and methane from decomposing FOG stay inside the trap, not in your kitchen
- Odour — a broken seal is the number one cause of grease trap smell complaints
Signs Your Gasket Needs Replacing
- Visible cracks or tears: Rubber gaskets dry out and crack after 12–24 months in a hot kitchen environment
- Grease seepage around the lid: If you see oily residue around the lid edges, the seal is gone
- Persistent sewer smell: Even after a fresh cleaning, if the trap area smells, the gasket is likely the culprit
- Gasket feels hard or brittle: A good gasket is flexible. If it snaps when you bend it, replace it
- Lid does not sit flush: A compressed or deformed gasket lets the lid rock — that is a broken seal
- Water puddles around the trap: During dishwasher discharge cycles, water pressure spikes can push liquid past a worn gasket
How Often to Replace
As a general rule:
- Rubber gaskets: Replace every 12–18 months
- Silicone gaskets: Replace every 18–24 months
- After a deep clean or trap repair: Always check and replace if needed
Our technicians inspect the gasket during every scheduled cleaning visit. If it is wearing out, we flag it before it fails.
Replacement Process
- Step 1: Remove the trap lid and set it aside
- Step 2: Peel off the old gasket from the lid groove or body flange
- Step 3: Clean the groove — remove old adhesive, grease residue, and any corrosion
- Step 4: Fit the new gasket into the groove. Ensure it sits evenly with no twists or gaps
- Step 5: Replace the lid and press down firmly to seat the gasket
- Step 6: Check the seal — pour water around the lid edges and watch for any seepage
The whole job takes 20–30 minutes. We carry replacement gaskets on our service trucks for all common trap sizes and brands.
Gasket Specifications
- Material: EPDM rubber (standard) or food-grade silicone (premium)
- Temperature rating: -20 to +120 degrees C
- Common sizes: Cut to fit AG1–AG5, Type B (50–500L), and most Type C manholes — compare AG models to find the right gasket size
- Cost: AED 50–200 for the gasket itself, depending on trap size
What Happens If You Ignore a Bad Gasket
- Kitchen floor contamination: Grease on tiles is a slip hazard — liability risk for your staff
- Failed DM inspection: Inspectors check for visible leaks and odour. A leaking gasket fails both
- Accelerated corrosion: On mild steel traps, escaped grease and moisture attack the exterior coating, shortening the trap lifespan
- Pest attraction: Leaked grease on the floor draws cockroaches and drain flies
We Check Gaskets on Every Visit
Every grease trap cleaning we do includes a gasket inspection. If the seal is deteriorating, we replace it on the spot — no need for a separate service call. We also check baffles, inlet/outlet screens, and the outlet pipe condition.
For kitchens that want to reduce grease buildup and extend the life of all trap components, we recommend adding a bio-dosing system. Less grease sitting in the trap means less chemical degradation of the gasket.
Other Maintenance to Pair With Gasket Replacement
- Drain line jetting — clear the outlet pipe while the lid is off
- Baffle replacement — if baffles are corroded, swap them during the same visit
- Full trap inspection — check for cracks, dents, or corrosion on the trap body
Book a Service Visit
Call +971 58 570 7110 to schedule a cleaning and gasket check. We serve commercial kitchens across all seven UAE emirates — Dubai, Abu Dhabi, Sharjah, Ajman, Umm Al Quwain, Ras Al Khaimah, and Fujairah.
More questions? See our FAQ page or browse our full services list. For new trap installations, visit our supply and installation page.