The flange is an injection moulded plastic support ring, designed to fit and support the urine diversion pedestal. This flange is cast into the cover slab, with the pedestal being installed into the flange itself. This ensures a perfect fit and thus minimises the strain onto the concrete slab itself. The pedestal can be removed from the flange for cleaning / maintenance without damaging the concrete slab. Photo by Brian Lewis June/July 2008