Knossos

Liquid management

The palace had at least three separate liquid management systems, one for supply, one for drainage of runoff, and one for drainage of waste water.

Aqueducts brought fresh water to Kephala hill from springs at Archanes, about 10 km away. Springs there are the source of the Kairatos river, in the valley of which Kephala is located. The aqueduct branched to the palace and to the town. Water was distributed at the palace by gravity feed through terra cotta pipes to fountains and spigots. The pipes were tapered at one end to make a pressure fit, with rope for sealing. The water supply system would have been manifestly easy to attack. No hidden springs have been discovered as at Mycenae.

Sanitation drainage was through a closed system leading to a sewer apart from the hill. The Queen's Megaron contained an example of the first water flushing system toilet adjoining the bathroom. This toilet was a seat over drain flushed by pouring water from a jug. The bathtub located in the adjoining bathroom similarly had to be filled by someone heating, carrying, and pouring water, and must have been drained by overturning into a floor drain or by bailing. This toilet and bathtub were exceptional structures within the 1300-room complex.

As the hill was periodically drenched by torrential rains, a runoff system was a necessity. It began with channels in the flat surfaces, which were zig-zag and contained catchment basins to control the water velocity. Probably the upper system was open. Manholes provided access to parts that were covered.

Some links to photographs of parts of the water collection management system follow.

Runoff system. Sloped channels lead from a catchment basin.
Runoff system. Note the zig-zags and the catchment basin.