ost-effective non-pressure wastewater and drainage piping system made of Polypropylene (PP) available in diameters from 32 mm to 160mm, comply all requirements according to EN 1451-1, suitable for above & below ground installation inside the building structure.prefabricated additions and custom changes (e.g., multiple branches, special diameters) for its basic fittings range provide a solution for special projects.