Siphon sluice

Siphon sluices (French:épanchoir à siphon) are one of the many water management devices used on the Canal du Midi to regulate the level of the water. The siphon acts as an automatic water level regulator. The épanchoir à siphon, or siphon sluice, was designed by Bertrand Garripuy (Garipuy) Jr., the son of the chief engineer. The first épanchoir siphon was built in 1776 near Capestang and the second in 1778 at Ventenac.