The rainwater would exit to identical drainpipes on the east and west exterior walls. The project also includes the fixing of major water lines, drainpipes and sewer lines. Drainpipes also remove the need for a sloping roof. He was an early advocate of the use of earthenware drainpipes for field drainage. The early work was utility wares including drainpipes and tiles. The copper drainpipes are decorated with dragon's heads. Its roof receives one of the two drainpipes on this face. As one walks around the cathedral one sees many quite distinctive drainpipes.