In the 9th century, after the Carolingian reconquest, the abbot of Lagrasse became a lord of Pézilla. The Benedictine monks then project an irrigation canal designed to enhance the territory and drain the rainwater. Refurbished in the 14th century the Canal will always play a fundamental role in the life and economy of the village. On this channel of "ullals" distributed throughout the territory, "agulles" diversion channels provide abundant water to the village, farmers, crops, gardens. The Canal also supplied flour mills, oil mills and a fulling mill.