Not what I was after, but : PLUMBING!
http://www.theplumber.com/(edited for space)
By 2500 B.C. the Egyptians were pretty adept with drainage construction, accentuated by the significance that water played in their priestly rituals of purification and those affecting the burial of the kings. According to their religion, to die was simply to pass from one state of life to another. If the living required food, clothing and other accoutrements of daily life, so did the dead. Thus, it's not surprising that archaeologists have discovered bathrooms in some tombs.
Excavators of the mortuary temple of King Suhura at Abusir discovered niches in the walls and remnants of stone basins. These were furnished with metal fittings for use as lavatories. The outlet of the basin closed with a lead stopper attached to a chain and a bronze ring. The basin emptied through a copper pipe to a trough below. The pipe was made of 1/16" beaten copper to a diameter of a little under 2". A lap joint seam hammered it tight.
Also found within a pyramid temple built by King Tutankhamen's father-in-law at Abusir, was a brass drain pipe running from the upper temple along the connecting masonry causeway to the outer temple on the river.
Excavators have discovered a tomb which supposedly contains the body of Osiris before he became a god. It contains the dividing line between Life and Death, i.e., a deep moat containing water that surrounds all sides of the figure of the god on his throne. After 5,000 years, water still fills the canal through underground pipes from the River Nile.
:wink: