Prehistory 2nd slide

By 2800 BCE private bathrooms, located on the ground floor, were found in many houses of the Indus civilization.Pottery pipes in walls allowed drainage of water and there was, in some case, provision of a crib for sitting in toilets.'Western-style' toilets were also made from bricks and used wooden toilet seats on top. The waste was then transmitted to drainage systems. Large scale sanitary sewer systems were in place by 2700 BCE.The drains were 7–10 feet wide and 2 feet below ground level. The sewage was then led into cesspools, built at the intersection of two drains, which had stairs leading to them for periodic cleaning. Plumbing using earthenware plumbing pipes with broad flanges for easy joining with asphalt to stop leaks was in place by 2700 BCE.