
If you own or operate a commercial kitchen, you know how important it is to have a properly installed and maintained grease trap. Grease traps are designed to prevent fats, oils, and grease (FOG) from entering the sewer system and causing blockages and backups. In this article, we will provide a step-by-step guide on how to install a grease trap in your commercial kitchen.
Types of Grease Traps

Before we dive into the installation process, it’s essential to understand the different types of grease traps available. There are three main types of grease traps: gravity, automatic, and passive.
Gravity Grease Traps
Gravity grease traps are the most common type of grease trap used in commercial kitchens. They work by allowing wastewater to flow through a series of baffles that separate the FOG from the water. The FOG then rises to the top, where it can be removed manually.
Automatic Grease Traps
Automatic grease traps use sensors to detect the level of FOG in the trap and automatically remove it when necessary. These types of grease traps are more expensive than gravity grease traps but require less maintenance.
Passive Grease Traps
Passive grease traps use a series of filters to trap FOG as it flows through the system. They are the most affordable option but require more frequent cleaning and maintenance.
When choosing the right grease trap for your commercial kitchen, consider factors such as your kitchen’s size, the volume of wastewater produced, and your budget. It’s always best to consult with a professional to determine the best type and size of grease trap for your specific needs.
Determining the Size of Grease Trap Needed
Once you’ve selected the appropriate type of grease trap, the next step is to determine the size needed. The size of the grease trap required depends on the volume of wastewater produced by your kitchen.
To calculate the size of the grease trap needed, you first need to determine the flow rate of wastewater leaving your kitchen. This can be done by measuring the flow rate of water leaving the kitchen sink and multiplying it by the number of hours your kitchen operates each day.
Once you have calculated the flow rate, you can use a sizing chart to determine the appropriate size of grease trap needed. It’s essential to choose a grease trap that is large enough to handle the volume of wastewater produced by your kitchen to prevent blockages and backups.
In the next sections, we will provide a step-by-step guide on how to install your grease trap and maintain it to ensure it operates effectively.
Determining the Size of Grease Trap Needed
Once you’ve selected the appropriate type of grease trap, the next step is to determine the size needed. The size of the grease trap required depends on the volume of wastewater produced by your kitchen.
To calculate the size of the grease trap needed, you first need to determine the flow rate of wastewater leaving your kitchen. This can be done by measuring the flow rate of water leaving the kitchen sink and multiplying it by the number of hours your kitchen operates each day.
Once you have calculated the flow rate, you can use a sizing chart to determine the appropriate size of grease trap needed. It’s essential to choose a grease trap that is large enough to handle the volume of wastewater produced by your kitchen to prevent blockages and backups.
Installing the Grease Trap
Proper installation of your grease trap is crucial to ensure it operates effectively. It’s important to follow the manufacturer’s instructions carefully and consult with a professional if necessary. Here’s a step-by-step guide on how to install a grease trap in your commercial kitchen:
Pre-Installation Considerations
Before installing your grease trap, there are a few things you should consider:
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Choose the right location: Your grease trap should be installed in a place that is easily accessible for cleaning and maintenance. It should also be located as close to the source of FOG as possible.
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Obtain necessary permits: Depending on where you live, you may need to obtain permits before installing your grease trap. Check with your local government to determine if permits are required.
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Ensure proper drainage: Your grease trap should be connected to the drainage system to ensure proper flow of wastewater.
Installation Process
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Dig a hole: The first step in installing your grease trap is to dig a hole in the ground where it will be installed.
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Install the inlet and outlet pipes: Install the inlet and outlet pipes according to the manufacturer’s instructions. Make sure they are securely attached to the grease trap.
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Lower the grease trap into the hole: Carefully lower the grease trap into the hole and ensure it is level.
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Connect the pipes: Connect the pipes to the grease trap, making sure they are securely attached.
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Backfill the hole: Backfill the hole with gravel or sand, ensuring the grease trap is properly supported.
Post-Installation Considerations
Once your grease trap is installed, there are a few things you should consider:
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Test the system: Test the system to ensure it is working correctly and there are no leaks.
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Schedule regular maintenance: Schedule regular maintenance to ensure your grease trap operates effectively. This includes regular cleaning and inspection.
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Train staff: Train your staff on proper grease disposal to prevent FOG from entering the grease trap and causing blockages.
By following these steps, you can ensure your grease trap is properly installed and maintained, preventing costly blockages and backups.
Maintenance of Grease Trap
Regular maintenance is essential to ensure your grease trap operates effectively and prevents blockages and backups. The frequency of cleaning your grease trap will depend on the type of grease trap installed and the volume of FOG produced by your kitchen.
Importance of Regular Maintenance
The buildup of FOG in your grease trap can lead to unpleasant odors, blockages, and backups in your plumbing system. Regular maintenance, including cleaning and inspection, can prevent these issues and extend the life of your grease trap.
How to Clean and Maintain a Grease Trap
Cleaning and maintaining your grease trap is a straightforward process that can be completed by a professional or your kitchen staff. Here are the general steps involved:
- Turn off all equipment and water supply to your kitchen sink.
- Remove the lid from the grease trap and inspect the contents.
- Use a scoop or container to remove the grease and solids from the trap and dispose of them properly.
- Use a high-pressure water hose to clean the interior of the grease trap and remove any remaining FOG and solids.
- Replace the lid and turn the equipment and water supply back on.
It’s essential to keep a record of when your grease trap was cleaned and inspected to ensure regular maintenance is performed.
Frequency of Cleaning
The frequency of cleaning your grease trap will depend on the type of grease trap and the volume of FOG produced by your kitchen. Gravity grease traps should be cleaned at least every three months, while automatic grease traps can go longer between cleanings. Passive grease traps require more frequent cleaning and maintenance.
Conclusion
In conclusion, installing and maintaining a grease trap is essential for any commercial kitchen to prevent blockages, backups, and costly plumbing repairs. By selecting the appropriate type and size of grease trap, following the installation guide, and performing regular maintenance, you can ensure the smooth operation of your kitchen and prevent FOG from entering the sewer system. Remember to keep a record of when your grease trap was cleaned and inspected and consult with a professional if you have any questions or concerns.