Water blades & scuppers Scuppers are channels cut in a wall through which water can pass. When a water blade is added to a scupper, they produce a simple and transfixing water feature to a wall. This makes them ideal when used in conjunction with ornamental feature walls. Usually they will have a pool at the base of the wall from which the water is pumped back up to the blade. Consider added wide coping stones to the pool wall to allow you to sit on its edge and run your hand lazily in the water in the evening sun!