Download Detailed Grease Trap CAD Drawing (DWG)
Includes:

• Inlet & outlet piping
• Baffle chamber design
• Trap dimensions
• Installation layout

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🧠 What is a Grease Trap?

A grease trap (also called grease interceptor) is a plumbing device used to capture fats, oils, and grease (FOG) before they enter the drainage system.

👉 It prevents:

• Pipe blockage
• Sewer clogging
• Bad odor

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📊 Grease Trap Working Principle

👉 How it works:

1. Wastewater enters trap
2. Heavy solids settle at bottom
3. Grease floats on top
4. Clean water exits outlet

👉 This separation happens due to density difference between oil and water

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📐 Kitchen Grease Trap Design Details

🏗 Standard Components

• Inlet pipe
• Baffle wall
• Grease chamber
• Outlet pipe
• Cleaning cover

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📏 Typical Dimensions

Component	Size
Inlet pipe	50–75 mm
Outlet pipe	75–100 mm
Trap depth	300–600 mm
Chamber size	Based on flow

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🧮 Grease Trap Sizing Formula

👉 Basic sizing depends on:

• Sink flow rate
• Retention time
• Grease capacity

👉 General rule:

Grease Trap Size = Flow Rate × Retention Time

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📊 Example (Real Kitchen Design)

Given:

• 2 kitchen sinks
• Flow rate = 20 L/min

Result:

👉 Required grease trap = 20–40 L capacity

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🏗 Practical Applications

Grease traps are used in:

• Residential kitchens
• Restaurants
• Hotels
• Commercial kitchens

👉 Especially required in:

• High oil usage areas

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⚠ Common Mistakes

• No grease trap → pipe blockage
• Wrong size → overflow
• No cleaning → failure
• Improper slope

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💡 Design Tips (VERY IMPORTANT)

• Install near kitchen sink
• Provide easy cleaning access
• Maintain proper slope
• Clean regularly

❓ FAQ

What is grease trap used for?

To remove oil and grease from wastewater.

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What pipe size is used for grease trap?

Typically 50–100 mm.

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Where is grease trap installed?

Below kitchen sink or outside building.

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How often should grease trap be cleaned?

When 25% full (recommended standard).

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🎯 Conclusion

Kitchen grease trap design is essential for preventing drainage blockage and maintaining a healthy plumbing system. Using proper sizing, layout drawing, and installation methods ensures efficient operation.