If you disagree, all you have to do is show us the OT scripture that Jesus was referencing about "living water"?
Moreover, the "living water" Jesus talked about was not fresh drinking water, it was the Holy Spirit:
(John 4:11-14) 11 “Sir,” the woman said, “you have nothing to draw with and the well is deep. Where can you get this living water? 12 Are you greater than our father Jacob, who gave us the well and drank from it himself, as did also his sons and his livestock?”
13 Jesus answered, “Everyone who drinks this water will be thirsty again, 14 but whoever drinks the water I give them will never thirst. Indeed, the water I give them will become in them a spring of water welling up to eternal life.”