How was water supplied to the Great Bath at Mohenjo-daro?

Water was supplied to the Great Bath at Mohenjo-daro by a large well located in an adjacent room.12

The structure itself was a sophisticated example of ancient engineering, featuring a floor constructed of two layers of sawed brick set in gypsum mortar, with a layer of bitumen sealer sandwiched between them to ensure it was watertight. Once used, the water was drained through an outlet in one corner of the bath, which led to a high corbeled drain that emptied on the west side of the mound.12