The poem begins by describing an old corrugated pipe, left useless after the hillside around it was clear-cut. One side has gone green with algae, the other red with rust, and the only holes are on top, where rain has worked its way in. Then the voice shifts to "I," and the pipe becomes a stand-in for an aging speaker, or at least a way of talking about one.
The speaker admits to being "of little use" for decades, yet doesn't sound bitter. Being full of holes is turned into something almost beautiful: a flute that only the rarest wind can play, a body that in the right light can nearly glow. Dissolution is accepted, but with a gentle stubbornness: "not right away." The rain, which causes the damage, is renamed as a kind of caretaker, offering "patient ministrations."
The mood is quiet, calm and wry, a mix of loss and contentment. It suggests that wearing away can still have dignity and even grace.