The Bible (1 Kings 9:15) mentions Gezer as one of four cities whose walls were built by King Solomon. Archaeologists have uncovered what they believe to be the ruins of Gezer; according to some, the evidence suggests that its walls were indeed Solomonic. But the city’s sophisticated water system is decidedly older, as Henry Curtis Pelgrift writes
[T]he water system at Tel Gezer has now been dated by project archaeologists to a much earlier period [than King Solomon’s day]—the Middle Bronze Age (MBA)—with a date as early as 2000 BCE. In fact, this should not be surprising, since Gezer is also the site of massive fortifications and other structures dating to the MBA—in addition to the Iron Age monumental architecture of biblical fame. . . .
Gezer was originally inhabited in about 3500 BCE. but remained a small settlement until the MBA, when massive fortifications were constructed throughout the site, including stone walls, possibly several stone towers, a glacis, and a large gate on the south side of the west hill. . . . The water system at Tel Gezer was meant to provide a safe means of getting water to Gezer’s inhabitants within the city walls.