In the modern town of Harappa, a covered drain built along the outside of a house takes sewage water from a second storey latrine and bathroom to the street level drain without splashing people passing by on the street.
Many of the buildings at Mohenjo-daro had two or more stories. Water from the roof and upper storey bathrooms was carried through enclosed terracotta pipes or open chutes that emptied out onto the street, such as this one on a house in DK-G Area.
A small drain leads from the well and finely fitted brick floor of the dyer's workshop to a covered drain at the edge of the street.
Many drains from upper buildings were directed to the street through enclosed channels or terracotta pipes. The pipes were made using multiple telescoping segments that fit snugly with the next segment.
Close-up view of ground floor drain outlet from the street side, showing a brick on edge with a notch was placed across the drain hole to keep objects from flowing out with the bath water.
The ground floor drain of the bathing platform empties out into the street next to tapered chute from a roof drain or a second storey bathing area.
This large drain was partly covered along its length with large flat blocks made out of limestone from the Rohri hills, which are located to the north and on the other side of the Indus River.
Looking north along the street to the east of the Great Bath. The building on the right is a single large structure called the College, and may have been the residence of priests or other elites (see Slide 38).