Have just cut off my PVC tubes ready to receive new Hypalon tubes. It was interesting to view the baffles when tubes dissected. Difficult to describe without pictures, but all five baffles had gone, perhaps uneven pressures when inflating, but more I think - over heating in the sun. Also kids using the tubes as a trampoline for diving wouldn't have helped.
The construction of the baffles were not as I was expecting. I thought they would be PVC circles stuck to the tubes at the circumference. They weren't, more like a wind sock. Windsocks for Airports/Airfields/Heliports : McWilliam WindSocks
They lie along the tube, obviously stuck at the larger circumference end to the tube and the narrowing end, just closed together and stuck.
So when inflating tubes, too much air one side of chamber would in effect turn the wind sock inside out and force it back on itself - so it would lie in the opposite direction in the tube. No problem with that I guess, as when you inflate the other adjoining chamber, it will try and do the same in reverse!
God this is getting difficult to describe in words
It would have been uneconomical to have repaired all baffles and would have ended up with five patches. Tubes were nearing the end of life so forced into new.
I guess the important bit for me now is that the new tubes have A6 over pressure valves. Avoiding any build up in pressure which destroys the baffles.
However tubes must have been like that for 3 years and I never had any problems or even noticed for that matter. Only became an issued once the tubes sprung a leak from seam at tube cone, deflated tubes coming back from I of W, completely flat and looked like a scuttle fish.
I was nearly tempted to leave off the tubes altogether
looks more like a surf board