DIY Ground Fridge System for Ø200mm Pipe & M10 Rod

 Keep your drinks and snacks cool naturally using the earth's stable underground temperature! This modular system is designed to fit inside a standard Ø200mm sewage pipe buried vertically in the ground. The shelves are spacious enough to accommodate most standard cans, beer bottles, and even larger wine bottles.

Performance: During summer tests, the internal temperature remained at approximately 15°C (59°F) when the outside air temperature was 30°C (86°F).

Bill of Materials (Hardware to buy): Before starting, you need to source a few hardware store items:

• 1x Ø200mm PVC Pipe (approx. 1 meter length, or deeper if you prefer).

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• 1x End Cap for the Ø200mm pipe. Important: The pipe must be sealed at the bottom before burying it to prevent ground water ingress.

  

  

• 1x M10 Metric Threaded Rod (1 meter length, stainless steel recommended).

3D Printed Parts & Assembly:

• Fully Threaded Design: All printable components (shelves, handle, etc.) feature internal M10 threading throughout their entire height.
• Tight Tolerance: The thread is designed to be a tight fit. This is intentional to ensure the shelves hold their position firmly without slipping.
• Printing Tip: If you find the thread is too tight due to your printer's calibration, try slightly scaling up the parts in the X and Y axes only (e.g., by +0.5% or +1%) in your slicer.

Customization:

• Modular: The system is fully configurable. You can print as many shelves as you need and space them out anywhere along the threaded rod.
• Accessories: I have also included files for custom storage boxes/containers designed to fit perfectly onto the shelves.