The thought is that screws are screwed in a wall, or a wall hanged plywood board, where the shell can then be hanged unto the screws in series so that the water can be pumped up to the top planter. I've tried and designed it so that it can easier be printed (hence the triangle holes).
The outer diameter of the hose nozzle is for a 13 mm hose.
The author marked this model as their own original creation.