How to Install a 35-Gallon Grease Trap

Grease traps are used in industrial kitchens to prevent solids from entering the wastewater system.

Grease traps, also known as interceptors, are used to recover grease from large kitchen equipment and remove the solids before it goes into the wastewater system. A 35-gallon grease trap means that it processes approximately 35 gallons per minute. On average, a grease trap this size holds approximately 70 pounds of grease and is approximately 30 inches long by 22 inches wide and 21 inches tall.

Things You'll Need

• Grease trap kit
• Adjustable wrenches
• PVC pipe
• PVC cement

Instructions

1. Check the specifications for your grease trap to confirm you have the right piping size to fit the outlet connections of the trap.

2. Place the grease trap as close to the cooking fixture as possible. Ensure you have sufficient clearance to open the trap for cleaning and maintenance.

3. Install the flow control valve next to the fixture by tightening the connection with adjustable wrenches by counter-synching the connection.

4. Install the vent or air take between the flow control valve and the grease trap. Connect all of the pieces using PVC piping with PVC cement to hold it together.

5. Connect the waste line of the cooking fixture to the inlet of the flow control device.

6. Connect the outlet of the grease trap to the vented waste line or drain line. Use PVC cement to secure the connection.

Tips & Warnings

• If space permits, install a cleanout tree before the flow control valve to help prevent debris buildup and allow easier cleaning through the cleanout plug.

References

• Canplas Plumbing: Endura GI Manual
• Plumbing Knowledge: How to Install a Grease Trap
• Ashland Polytraps: Installation Guide: Grease Traps