A grease trap that isn’t maintained regularly is a liability. In the UAE, an overflowing or uncertified grease trap can result in Dubai Municipality fines from AED 2,000 to AED 50,000, a forced shutdown, and expensive emergency call-outs. The good news: consistent maintenance is straightforward and far cheaper than the alternative.
Why Grease Trap Maintenance Matters
Fats, oils, and grease (FOG) from cooking accumulate in every commercial kitchen’s drainage system. Your grease trap catches this FOG before it reaches the municipal sewer — but only while there’s capacity left to absorb it. Once the trap reaches capacity, FOG bypasses the baffles and enters the sewer line, causing:
- Blocked pipes and kitchen drain backups
- Foul odours throughout the kitchen
- DM violations and potential licence suspension
- Emergency pump-out costs at premium rates
Regular maintenance prevents all of this. How often you need to clean depends on your kitchen type, volume, and the size of your trap.
Signs Your Grease Trap Needs Immediate Attention
Don’t wait for an overflow. These warning signs indicate your trap is approaching or has exceeded capacity:
- Slow-draining sinks — the earliest indicator; the trap is restricting flow
- Drain odours — hydrogen sulphide from decomposing grease, noticeable near floor drains
- Grease surfacing around floor drains — the trap has reached capacity and is bypassing
- Wastewater backing up — emergency territory; call for same-day service immediately
If you’re experiencing a full overflow, read what to do in a grease trap emergency — containment steps to take before the engineer arrives.
How Often Should You Clean Your Grease Trap?
Dubai Municipality’s rule of thumb under DM Technical Guideline No. 13 is to clean before FOG accumulation exceeds 25% of the trap’s working volume. In practice:
- Hotels and large restaurants: every 2–4 weeks
- Mid-size restaurants and cafes: every 4–8 weeks
- Small cafes and canteens: every 2–3 months
These are baselines — a busy Ramadan period or a fryer-heavy menu will push your frequency higher.
What a Professional Grease Trap Clean Involves
A DM-compliant service is more than just pumping out liquid. A proper clean covers:
- Full vacuum pump-out — all contents removed, not just the surface layer
- Scraping baffles and walls — hardened grease on the internals is scraped away
- Inlet/outlet inspection — checks for damage, scaling, or root intrusion
- Lid and seal check — prevents odour escape and unauthorised discharge
- Service certificate issued — DM-ready documentation recording date, volume removed, and technician ID
Keep certificates on file. DM inspectors frequently request the last 6–12 months of service records. See the full penalty schedule for what happens when records are missing.
Staff Practices That Reduce Maintenance Frequency
The biggest contributor to rapid trap fill-up is avoidable: staff pouring cooking oil directly down sinks. A few operational changes extend pump-out intervals significantly:
- Place oil collection bins beside all fryers — empty into a sealed waste container, not the drain
- Dry-wipe pots and pans with paper towels before washing
- Install a bio-dosing system that introduces grease-eating bacteria between pump-outs (does not replace cleaning, but slows FOG build-up)
- Brief new kitchen staff on FOG disposal during onboarding
Dubai Municipality Compliance Requirements
Maintenance isn’t just good practice — it’s a legal obligation. DM’s grease trap regulations require that commercial kitchens:
- Maintain a functioning, correctly sized trap at all times
- Service it at regular intervals with a licensed contractor
- Retain service certificates and make them available for inspection
Failure to comply can result in fines ranging from AED 5,000 to AED 50,000 or more, plus a mandatory re-inspection before operations can resume. Need a new or larger trap? See our supply and installation options.
Maintenance Contract vs. One-Off Cleans
One-off bookings work if your kitchen volume is very low and predictable. For most commercial operations, a scheduled maintenance contract is the smarter option:
- Fixed visit dates — no need to remember to book
- Certificate filing handled by your contractor
- Priority response for emergency call-outs between visits
- Lower per-visit cost than ad hoc bookings
GTC offers monthly, bi-monthly, and quarterly contracts across Dubai and all seven UAE emirates. For common questions, check our FAQ page. Visit our services page for pricing and contract options, or call +971 58 570 7110 to discuss a plan for your kitchen.