A section of an aqueduct (Channel E), which led water to the Byzantine settlement and monastery(?) at Tel Tanninim, was found some seventy meters west of the High Aqueduct to Caesarea. New data concerning the water level in the Lower Aqueduct to Caesarea dismissed the previous hypothesis that the Lower Aqueduct was the water source of Channel E. The results of several surveys and excavations pertaining to the question of the water source of Channel E, point to the High Aqueduct to Caesarea as its water source. Excavations clearly showed that Channel E was built in two stages: first a ceramic pipe was laid on the sand dunes, and later, a gravity channel was built, founded atop the earlier pipe, which was then covered with a cement envelope. Both stages of Channel E were dated based on chronological considerations to the Byzantine period.