τὸ ἐγδοχῖον τοῦ ὕδατος καὶ τὰ ἐν τῆι πόλει ὑδραγώγια → the water reservoir and the conduits in the city (or on the acropolis)
διέξοδος, ἄνυσις, ἔκβασις, διεξάνυσις, πρᾶξις, πρῆξις