Grease Trap and Interceptor Maintenance

Grease trap maintenance should be performed by JPG Plumbing Services. Maintenance of your Grease Interceptor (sometimes called a Grease Abatement Device or “GAD”) is usually performed by permitted haulers or recyclers.  The maintenance process consists of removing the entire volume (liquids and solids) from the GAD and properly disposing of the material in accordance with all Federal, State, and/or local laws. When maintenance is performed properly and at the appropriate frequency, your GAD will reduce the discharge of fats, oil, and grease (FOG) into the municipal wastewater collection system.

A proper maintenance procedure for a typical grease trap

The frequency required for GAD maintenance depends greatly on the amount of FOG your facility generates as well as any best management practices that may be required by municipal authorities. In many cases, a food service establishment that implements better maintenance practices will realize financial benefit through a reduction in the plumbing and replacement costs for the GAD over the life of the unit.


Inside grease trap
1. Remove all water in the trap or interceptor to facilitate cleaning. The water will be disposed of according to local code and NOT placed in the sanitary system.
2. Remove baffles if possible.
3. Scrape the sides, the lid, and the baffles to remove as much of the accumulated grease as possible.
4. Inspect the entire system for signs of trouble. Verify that all components appear to be operating effectively.
5. Replace the baffle(s) and the lid.
6. Verify proper flow by allowing the trap to fill with water.
6. Record the volume of grease removed on the maintenance log. (electronically)

GAD (exterior unit)
1. Contact JPG for cleaning.
2. Remove all liquid and accumulated grease and solids from the GAD, beginning with the inlet chamber and ending with the outlet chamber.
3. Inspect all GAD walls and structures for signs of trouble and visually inspect the outlet baffle and outlet pipe for evidence of proper operation.
4. Replace all GAD lids and ensure that work area is made safe.
5. Clean the work area with high pressure water to ensure a sanitary condition.
6. Record the volume of grease removed on the maintenance log. (Ask about electronic delivery and tracking!)