John, when I did the course at Falfield a few years ago, they were talking about replacing any hose (wall to equipment) found to be over five years old. No doubt you are already aware of the colour-coded disc system used by the main players (that is, to identify the year of manufacture).
All the "advice" was a bit vague, though, as usual. Perhaps the current students get a bit more "Chapter and Verse" (but somehow I doubt it).
Meanwhile, it may come as a surprise to some on the forum that the course notes (and I'm looking at them now) also make mention that "manufacturer's recommendations suggest a quarterly inspection"!
Regarding wall outlets, I guess the place to look would be HTM 2022.
