Pipe that drains the lowest growing pipe into the reservoir

Bill of materials

Count Item ID Source
1 1/2" PVC piping elbow Hardware store
1/2" PVC pipe, approx 2ft Hardware store
PVC glue Hardware store


No distances are given as they depend on the actual distances in your assembled system, and assuming you got everything at perfectly the right distances seems like a bad idea here. Note that most of these pipes will likely have different dimensions in your system and no two will be totally alike.

Required tools

  • PVC pipe cutter, or a handsaw and file, to cut the PVC pipe to the correct lengths and deburr


This is a little tricky, because this pipe needs to be of the correct length and that correct length is likely to be not what you think due to:

  • tolerances of the growing pipes and their holes, compared to the blueprints;
  • the inherit imprecision how deeply the pipe inserted into the elbow will actually go before the glue starts making adjustments impossible.

It is recommended to leave the pipe ends longer than necessary until final assembly of the system, when they can be cut if needed.