BS EN 13598-1:2020 pdf free.Plastics piping systems for non-pressure underground drainage and sewerage - Unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP>) and polyethylene (PE).Specifications for ancillary fittings and shallow chambers. BS EN 13598-1 Ancillary fttings according to this document are intended for use in pedestrian areas, except rodding tees and mechanical saddles which can also be used in vehicular trafficked areas....