The earliest known example of engineered water pressure was found in Maya City.
How the Maya used the pressurized water, is however unknown.
The city of Palenque was built around the year 100 in a constricted area with little land to build on and spread out to. By the time the cities population reached its limit, the Maya had saved precious urban space by routing streams beneath plazas, using precious urban space by routing streams beneath plazas using aqueduct like structures.
The pressurized water feature is called Piedras Bolas Aqueduct, a spring-fed channel on steep terrain.
From the tunnel’s entrance to its outlet 200 feet downhill, the elevation drops about 20 feet and its diameter decreased from 10 feet near the springs to about a half a foot where the water emerges.
This combination of a downhill flow and sudden channel restriction pressurized the water, shooting it from the opening to an estimated height of 20 feet.
Researches are not too sure as to what the Maya used pressurized water for, but they have a few ideas.
One possibility is they used it to lift water into the nearby residential area for waste water disposal.
Another possibility is they used it to lift water into the nearby residential area for waste water disposal.
Another possibility, and the idea researchers used as their model, was a fountain.
A similar feature was found in the city’s palace.
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