Pipe Layer

Drag pipes from stockpile along right to build pipelines through all units (magenta boxes).

All flow is top-down.
All units must be distributed to from source pipe at top.
All units must have a down drain pipe.
All drain pipes must lead to collection pipe at bottom.
No drain fluid can be allowed to proceed to another unit.
Uncontaminated fluid is allowed to proceed out the side of a unit.

Become master of the pipe.