Liquid Environmental Solutions


We’re always happy to take time to answer your questions. Below are some of the most common ones we encounter. Got another? Just contact us using one of the links at the bottom of this page.

Grease Trap

My Grease trap is overflowing. What do I need to do?

If you are experiencing a backup where there is grease trap waste overflowing from the grease trap manhole cover this usually indicates a clog in the outgoing grease line. You may also experience drains backing up within the establishment. In this instance, pumping the grease trap will not alleviate the problem. Calling a plumber to perform a jetting service will be necessary.

If you have an interior grease trap that is overflowing, first call a plumber. Typically clogs are in the lines and can be cleared with a jetting service. However, if the interior trap continues to be an issue a pumping may be necessary.

I noticed that my grease trap is full? What should I do?

The grease trap should always be full. If a plumber has told you that your grease trap is full, or if you lift up the lid to your grease and see water levels nearly reaching the top of the trap, you may think that your grease trap is full and needs to be pumped. This is almost never the case. Exterior interceptors work by using gravity within the tank to separate out the Fats, Oils, and Greases (FOG) from the water. If the trap were not full it would not be working properly. For most drain and backup issues, grease trap pumping is not the solution.

What is a grease trap?

A grease trap is a device that wastewater flows through prior to entering your city’s sanitary sewer system. The device traps Fats, Oils and Greases (FOG), preventing it from flowing into the sewer line and clogging it. When the wastewater goes through the grease trap, the FOG rises to the surface and floats on top of the water, while the solids sink to the bottom. The FOG is then trapped inside the grease trap while the rest of the water exits to the sewer line.

How do I maintain my grease trap?

It is important to have your grease trap serviced regularly and in compliance with any municipal pumping requirements.  This will help prevent costly backups and overflows, as well as possible fines from local municipalities.

Why is there an odor after I have had my grease trap serviced?

There are several reasons why your grease trap cleaning may leave an.

If an odor lingers for a short while right after a trap service has been completed, this is typically due to the water flowing back into the trap and the odor will soon dissipate as the trap fills up. 

Odors coming from the floor drains could be due to a backup in the line leading to the trap. Pouring very hot water down the drains will often help alleviate the odor.  If the odor persists after pouring water down the drains, you may need to contact a plumber to snake the lines.

Grease trap odors can also escape through a worn or corroded gasket around your manhole cover allowing gases to escape.

A plumber said that my grease trap is full and must be emptied before he jets or snakes the lines. What should I do?

This is almost never true. A plumber can usually access lines to jet or snake without having the grease trap emptied. However, if the plumber has to enter the grease trap to perform a repair, then a coordinated service will need to be scheduled with LES and the plumber so that the trap can be emptied for repairs to be completed.

Used Cooking Oil

My used cooking oil is full. What should I do?

Do not add any more cooking oil to the tank.  Doing so will cause spillage to overflow onto the ground. If it is full, you can use a container to collect any additional oil until LES can arrive to service. Make sure you are storing the excess storage container in a safe area close to your UCO bin to avoid an employee from tripping or falling. Please do not put the oil in your refrigerator or freezers. The UCO needs to be soft for collection and refrigerating or freezing it will cause it to harden and solidify. Please contact LES at 866-694-7327 to schedule service.

To be sure that your bin is actually full, it is important to make sure your bin grate is free from debris. A clogged or obstructed grate will not allow the oil to pass into the bin.

Why do I need to collect my oil? Why can I not pour it down the drains?

Used cooking oil cannot be poured down the drain because it will build up in the pipes, causing clogs and then backups in your restaurant’s plumbing. This can pose a significant health and safety hazard in a restaurant environment. The used cooking oil will also cause high levels of grease to be discharged into the local sewer system which can cause clogs and backups in local sewer systems as well as result in violations and fines for you as the generator.

I have an oil spill around my bin. What do I do?

The best way to clean up an oil spill is to first block off the area so no one walks or drives through it. Then you will need to put down an absorbing agent to soak up the oil. This can be kitty litter, oil dry, or quick dry.  Allow the oil to be fully absorbed before sweeping up the absorbent and then discard in trash.