The pipe comes out the other side through a piece of rainwater 3inch down pipe inserted as an after-thought, entailing masonory drills, hammer & chisels, sweat etc. were its reconnected to the waste water pipe again, which is a lot cheaper than the flex pipe
which is not yet in its final alignment, needs tidying up back along the top of the ledge & possibly burrying in the soil
the watse pipe then discharges into another piece of down spout that was built in when the planter was originally constucted
& passes through the cliffs to discharge into the top water behind the viaduct