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Commercial maintenance

Grease trap maintenance

Routine servicing and emergency clean-outs on commercial-kitchen grease traps and interceptors.

If you operate a commercial kitchen anywhere in London, fat-oil-grease (FOG) management is a legal requirement under the Building Regulations Part H and your Trade Effluent Consent with Thames Water. Failure to install and maintain an adequate grease trap or interceptor can lead to enforcement notices, drainage adoption disputes, and (most expensively) £2,000+ in jetting and CCTV costs every time your soil pipe blocks.

Our commercial drainage team installs new grease traps for fit-outs, services existing units on scheduled monthly or quarterly contracts, and provides FOG-management documentation for your environmental health records.

Need this service in London?
When We Use This

Where this service applies

  • ✅ New restaurant fit-outs requiring Building Regs sign-off
  • ✅ Existing restaurants needing scheduled grease trap servicing
  • ✅ Compliance with Thames Water Trade Effluent Consent conditions
  • ✅ Section 111 enforcement notices from local authority Environmental Health
  • ✅ Pre-handover restaurant due diligence for landlords
  • ✅ Fast-food chains with multi-site contracts
  • ✅ Hotel kitchens, school kitchens, hospital catering operations
  • ✅ Catering companies operating from commercial kitchens
Our Process

How we deliver

  1. 1
    Site survey
    Existing kitchen layout, current FOG management (if any), Thames Water Trade Effluent status, drainage routing assessment.
  2. 2
    Sizing & specification
    Grease trap or grease recovery unit sized to peak flow per BS EN 1825. Manufacturer recommendation (Surepac, Aco, Mechline).
  3. 3
    Building Regs compliance
    Drainage routing under Part H, vent arrangements, access for servicing.
  4. 4
    Installation
    New unit installed. Existing pipework adapted. Building Regs notification submitted.
  5. 5
    Servicing schedule
    Monthly, quarterly or six-monthly cleaning. Volumes recorded for waste-transfer notes.
  6. 6
    Compliance documentation
    Service records issued for environmental health audits and Trade Effluent compliance.
Frequently Asked

Your questions answered

Do I legally need a grease trap in my London restaurant?
Almost certainly yes. Under Building Regulations Part H and your Thames Water Trade Effluent Consent, kitchens that produce FOG must have effective management. Without a trap, FOG enters the public sewer where it solidifies ("fatbergs"), and Thames Water can charge you for blockage clearance plus enforcement penalties under the Water Industry Act 1991.
How often does a grease trap need cleaning?
Depends on capacity vs covers served. Typical fast-food: monthly. Mid-volume restaurant: quarterly. Low-volume cafe: six-monthly. We'll advise based on your specific operation and adjust the schedule based on actual fill rates.
How much does grease trap servicing cost?
Servicing is priced after a free on-site consultation and a written fixed-price quote, with no obligation. Pricing reflects unit type (under-sink vs in-floor), access and visit frequency, and multi-site contracts attract lower per-visit rates. Includes waste-transfer note and compliance documentation.
Can you install a grease trap in an existing restaurant?
Yes, retrofit installations are common. We size the unit to your kitchen, manage the drainage modifications, and handle Building Regs notification. Installation is priced after a free on-site consultation and a written fixed-price quote, with no obligation.
Do you do scheduled service contracts?
Yes, standard service contracts are 12-month rolling agreements with monthly, quarterly or six-monthly visits. Multi-site operators get tiered pricing.