For better seal of the cascading pipe connecting to the growing pipe



This is an optional part. It has two parts: a top and a bottom, which need to be 3D-printed. Once printed, they slide into each other from inside and outside the drainage hole of the growing pipe, holding the exiting cascading pipe in place.

As 3D printing does not produce smooth surfaces, using this part requires suitable caulking (outdoors, waterproof, preferably flexible).

Bill of materials

  • Food-safe 3D printing filament

Required tools

  • 3D Printer

  • PC running OpenSCAD.

  • PC running a slicing program suitable for your 3D printer, such as Slic3r.


  • Download the following OpenSCAD models:

  • Alternatively, if you are familiar with git and have it installed, clone the entire Project Springtime website from here and look for the .scad files in content/parts/flange-1/cad.

  • In OpenSCAD, open each .scad file at a time and select "Design/Render (F6)".

  • In OpenSCAD, export each file as STL.

  • In your slicer, place the previously exported STL file. We suggest you slice and then print one file at a time.

  • In your slicer, you can probably use default parameters for your printer. (You know your printer better than we do.)

  • In your slicer, export the G-Code and print the G-Code with your 3D printer.