'Water gate' in the Bible

The temple servants were living in Ophel [the hill south of the temple], and they made repairs as far as the front of the Water Gate on the east and the projecting tower.

Then all the people gathered together as one man at the open square in front of the Water Gate; and they asked Ezra the scribe to bring the Book of the Law of Moses which the Lord had given to Israel.

Then he read from it, in front of the open square which was in front of the Water Gate, from early morning until midday, in the presence of the men and women, those who could understand; and all the people listened carefully to the Book of the Law.

So the people went out and brought them and made booths for themselves, each on the roof of his house, and in their courtyards and the courtyards of God’s house, and in the open square of the Water Gate and in the square of the Gate of Ephraim.

At the Fountain Gate they went directly up the steps of the City of David by the stairway of the wall above David’s house to the Water Gate on the east.