Butane gas 'Butano' Change regulator 5 years.

I just changed the regulator on the Butane bottle top, which is interesting, 'the change date was on the pipe, not the valve', however, the modern orange pipes are super plastic so should not perish, (like the old rubber ones). Because the date is on the pipe & not on most valves I note many Spanish people change just the plastic pipe with the date on, 'but not the valve', the more critical part, this can leak & also make the bottle 'sweat' (the gas in the bottle can overheat due to incorrect pressure) when the diaphragm & spring weakens.  

https://www.youtube.com/watch?v=LqTKKTzVebU