It’s funny how some things come as a surprise, as was the case when the item seen below finally decided to fail on me, after many decades of faithful service.
I’m not sure when I bought this, but I picked it up when I bought my first proper air compressor to power various air tools in my garage. It was the biggest that could be operated from a single phase 240 V 13 A domestic outlet, and the only way to get more air would have been to add a 3 phase supply, and that was something that definitely wasn’t going to happen. It was before 2000, maybe even 1990, so that hose lasted well.
However, when I snapped the connector into place, and pulled the hose, I knew it’s days were over, and it started to hiss.
Hardly a surprise, I’ve been watching cracks appear in the outer covering for years, although the core seemed to be unaffected – until now.
The source was close to the working end, where tools etc get plugged into a quick connect, but I didn’t think this would be all, and it turned out I was right,
I dunked the whole thing in a bath of water, and there were more streams of bubbles to be seen. Pretty small, and nothing like the hissing fail at the end, but realistically, this hose was gone.
Like the insulation in valve radios from the 1930s, this hose was derived from natural rubber, and was only going to get worse. I’m almost surprised it lasted as long as it did.
That said, I added various modern synthetic hoses to my collection over the years, and they would all still appear to be like new, since they don’t get abused.
Oh well, off to the skip it goes.

You can see the blue covering is covered with cracks.
At least I get to keep/re-use the fittings from the ends.
You can never have too many fittings
😱

