I am planning a solar panel, which will be at the edge of the roof so that the pipework can dive over the edge and in through the gable end. However the out (flow) connection of the panel will be right next to my cylinder coil in the attic below and it would be a more direct and efficient route by about 20 ft if I could go out of the panel, through the tiles and straight into the coil.
Is it worth trying to do this? Does a flashing system exist?
Is it worth trying to do this? Does a flashing system exist?