Last Updated: 30th Oct 2023

Maintaining your Grease Trap: Hints & Tips

  • Here are a few tips for effective and hygienic maintenance of your grease traps, ensuring the best results for your business and the environment.
  • Clean food solids and FOG products regularly from the grease trap; frequency will depend on the size and capacity of the grease trap. Store fats, oils and grease in a suitable container until collection is arranged.
  • Only use a licensed grease contractor to dispose of FOG.
  • Regularly check grease traps to assess the integrity of the structure. Note any damages to internal and external walls, fixing or replacing as necessary.
  • Always keep a complete record of cleaning, maintenance and disposal on site and ready for inspection.
  • Make sure the lid fits firmly to prevent pests getting in and unpleasant odours getting out.
  • Always follow manufacturer's guidelines for cleaning and maintenance.
  • Keep grease traps cleaner overall by using a liquid fat digester to break down grease and fats and reduce manual cleaning.
  • Consider an automatic dosing pump to deliver regular quantities of fat digester.

General Kitchen Procedures

  • Scrape any residue food from plates and utensils into the bin; wipe items to remove excess oil or fat before rinsing.
  • Always use strainers in sinks.
  • Clean sink strainers and standpipes regularly to keep sinks and grease pipes free of debris.
  • Collect used oil in a suitable container to be removed by a registered contractor.
  • Fully train staff in appropriate kitchen operations. Ensure full understanding of correct procedures and how to deal with FOG responsibly.


  • Flush the sink with boiling water as it will partially break down FOG and allow it to pass through to drainage systems, causing problems further down the line.
  • Use a grease trap in conjunction with a high temperature dishwasher.
  • Connect any form of garbage disposal to a grease trap.
  • Use any chemicals or bleach in the grease trap; this will kill natural bacteria and may harm the environment.