Grease traps are a legal requirement for virtually every commercial kitchen in the UAE. Whether you run a restaurant in Downtown Dubai, a hotel in Business Bay, or a catering facility in Al Quoz, understanding how grease traps work — and how to keep them compliant — protects your licence, your drainage, and your business.
What Is a Grease Trap?
A grease trap (also called a grease interceptor) is a plumbing device installed between your kitchen drainage and the municipal sewer system. It slows wastewater flow long enough for fats, oils, and grease (FOG) to cool and separate from the water. The FOG floats to the top and is retained in the trap; clarified water flows out to the sewer.
Without a functioning grease trap, FOG solidifies inside pipes and sewer lines, causing blockages, backups, and regulatory violations. Learn how grease traps work in detail, including the physics behind FOG separation and the types approved for use in Dubai.
Who Needs a Grease Trap in the UAE?
Dubai Municipality’s guidelines under DM Technical Guideline No. 13 require grease traps for any food-handling facility that discharges greasy wastewater. This includes:
- Restaurants, cafes, and fast-food outlets
- Hotel kitchens and banquet facilities
- Catering companies and cloud kitchens
- Hospital and school canteens
- Supermarket deli and bakery sections
- Food courts and central kitchen facilities
Choosing the Right Grease Trap Size
Undersizing is the most common mistake — and the most expensive. A trap that fills faster than it’s cleaned overflows into the sewer, triggering DM fines and emergency call-out costs.
Dubai Municipality uses a flow-rate formula to determine minimum capacity:
- Step 1: Count all fixtures draining to the trap (sinks, dishwashers, floor drains).
- Step 2: Calculate peak flow rate in litres per minute.
- Step 3: Apply the DM retention time factor (typically 2.5 minutes) to arrive at minimum capacity in litres.
For a worked example using the official DM formula, see the grease trap sizing guide, or use our grease trap sizing calculator for an instant estimate.
Installation: Getting It Right From the Start
A correctly installed grease trap must be:
- Positioned as close to the source fixtures as practical
- Accessible for inspection and pump-out without disturbing kitchen operations
- Vented to prevent siphoning and odour build-up
- Constructed from DM-approved materials (stainless steel or GRP) — see our AG model comparison for approved units
GTC supplies and installs DM-approved interceptors with a completion certificate. Visit our supply and installation page or contact us on +971 58 570 7110 for a site assessment.
Cleaning and Maintenance
Even a correctly sized trap requires regular pump-out to stay compliant. DM’s general guideline is that grease accumulation should not exceed 25% of the trap’s working volume — in practice this means:
- High-volume kitchens (hotels, large restaurants): every 2–4 weeks
- Medium-volume kitchens (casual dining, cafes): every 4–8 weeks
- Low-volume kitchens (small cafes, canteens): every 2–3 months
A professional clean includes vacuum pump-out, scraping the walls and baffles, and issuing a DM-ready service certificate. Attempting a DIY pump-out without licensed waste disposal is itself a violation. Between pump-outs, a bio-dosing system introduces bacteria that break down residual FOG and reduce odours.
Grease Trap Fines and Penalties
Dubai Municipality inspectors conduct unannounced checks. Common violations and their consequences include:
- No grease trap installed: immediate stop-work order, fine from AED 5,000
- Trap full or overflowing: AED 5,000–50,000+ depending on severity
- No cleaning records / expired certificate: fine from AED 2,000 + mandatory re-inspection
See the complete DM penalty schedule for current fine amounts and how to dispute a violation notice.
Troubleshooting Common Problems
Slow drainage from kitchen sinks — usually indicates a trap approaching capacity. Book a pump-out before it overflows.
Foul odour from drains — often caused by hydrogen sulphide from decomposing FOG. A full clean and baffles check resolves this in most cases.
Trap filling unusually fast — check whether staff are pouring cooking oil directly down drains. A FOG awareness session and oil collection bins at fryer stations dramatically extend pump-out intervals.
Overflow or backup — treat as an emergency. Sewage backing up through floor drains can trigger a DM shutdown. Call GTC on +971 58 570 7110 for a same-day emergency response across Dubai. More detail: what to do when your grease trap overflows.
Maintenance Contracts: The Simplest Way to Stay Compliant
A scheduled maintenance contract removes compliance from your to-do list. GTC visits on a fixed schedule, issues certificates after each clean, and provides advance notice when your trap needs attention between visits. Check our FAQs for common questions, or see our full services page. Call +971 58 570 7110 to discuss a plan for your kitchen.