Summarize the process of "trial by water." Where in the Code of Hammurabi is this process described?

Hammurabi keenly understood that, to achieve this goal, he needed one universal set of laws for the diverse peoples he conquered.

Trial by cold water was when the accused was thrown into a pool of water bound. If he/she sank and drowned he/she was innocent (and conveniently dead). If he/she floated and did not sink, he was taken to have been "rejected" by the water and must necessarily be guilty.