Grease Traps

Need for Grease Traps
If you use oil or grease in your establishment and they are washed into the sanitary sewer system, then you should have a grease trap or interceptor.

The size is largely determined by your maintenance schedule. If you have to clean it more often than you think you should, chances are the size needs to be increased. Typically, a drive-in restaurant will require between a 70 pound to a 100 pound interceptor depending on the food being prepared.

Not Installing Grease Traps
If you are a restaurant owner and use oil or grease in you food preparation, you will eventually have a maintenance problem with a plugged building sewer line. This blockage can create a sewer back-up situation and ultimately a health problem in your restaurant. Someone will have to pay to remove the blockage.

If the problem is in your building sewer line, then you will have direct responsibility for paying for the maintenance. If the blockage or restriction is in the public sewer main and it can be proven that you are the cause of the blockage, then you may also have to pay for the public sewer to be maintained.
How It Works
When maintained properly, grease traps prevent your kitchen grease and food waste materials from entering the city sewer system. Grease is a leading cause of sanitary sewer overflows, since it clogs sanitary sewer lines and ultimately causes line blockages.

The result is all too frequent discharges of untreated waste water into streets, homes and commercial enterprises.
Grease Trap Graph
Ultimately these problematic waste streams enter our local waterways, where they cause further cleanup costs and restrict recreation, tourism, and commerce. Your traps must be regularly emptied and periodically cleaned to prevent costly and dirty back-ups or over-flows.

Some other things to know include:
  • Your kitchen's complete plumbing system, including sinks, dishwashers, floor-drains mop-sinks, drains into the grease trap or grease interceptor system.
  • Waste water flows into either an interior or exterior (usually in-ground) grease trap system. A baffle separates the inlet and outlet of the trap, keeping grease in.
  • Grease floats to the top of the grease trap, while solids settle on the bottom. The trap or interceptor must be vacuum pumped regularly by a skilled service provider to remove the entire contents of the trap.
  • Clean water then continues to flow into your sewer or septic system.