Hexagram 48 is named for an object, and that is unusual enough to be significant. Along with hexagram 50, the Cauldron, it is one of only two figures in the book named after a manufactured thing, and the two sit close together in the sequence.
The judgement is one of the most quoted passages in the I Ching, and it survives translation well because it is concrete: the town may be changed, but the well cannot be changed. It neither decreases nor increases. People come and go and draw from the well. If the rope does not reach the water, or if the jug breaks, that is misfortune.
Everything about that is practical. A Bronze Age well was the fixed asset a settlement was built around, it outlasted the buildings, and a broken jug or a short rope was a real and ordinary disaster. The philosophical reading, an unchanging source available to all, which people must have the means to reach, follows naturally from the image, and the Ten Wings develop it at length. But the image came first, and it came from somebody who had drawn water.
The line texts track the well's condition: muddy and undrinkable, leaking so that only fishes use it, cleaned but not drunk from, lined with stone, a cold clear spring, and finally drawn up without hindrance. That progression from silted to serviceable is the hexagram's argument, and it is one of the clearest cases in the book of the six lines forming a single continuous account rather than six separate omens.
The pairing with the Cauldron is not accidental. A well supplies; a cauldron transforms what is supplied. Between them the two object-hexagrams cover the whole business of sustaining a settlement, which is a reasonable indication of what the compilers thought worth naming a figure after.