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 Topic: Safefill gas
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06/3/2025 at 7:02am
Location: Worcestershire
Outfit: Buccaneer Cruiser
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Quote: Originally posted by bofs on 05/3/2025
Many thanks again Monty.
The date of manufacture wasn't something I'd even thought about.
I don't think the date manufacture counts for anything? What counts od the date it is sold otherwise most of the stuff that you buy will be out of date. Most caravans come with tyres that are perfectly good and brand spanking new, but are 3 years old.
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06/3/2025 at 12:12pm
Location: London
Outfit: Lunar Cosmos 524
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Quote: Originally posted by iank01 on 06/3/2025
Quote: Originally posted by bofs on 05/3/2025
Many thanks again Monty.
The date of manufacture wasn't something I'd even thought about.
I don't think the date manufacture counts for anything? What counts od the date it is sold otherwise most of the stuff that you buy will be out of date. Most caravans come with tyres that are perfectly good and brand spanking new, but are 3 years old.
It's the only reliable, and often available means of identifying a cylinder's age, so it's what the industry works with!
As to caravan tyres, or any tyre for that matter, I've been told a couple of times from different 'professional' sources that the insurance industry/authorities judge the roadworthiness of a tyre at least in part, by it's age based on the stamped date of manufacture, not it's fitting/first in use date, therefore the general advice to ensure any replacement tyres fitted are not old stock!
Same goes for flexible gas pigtails with their stamped date of manufacture! I had a 'spare' pigtail from a defunct twin cylinder set up, that had only been used briefly (and that was more a technicality of being fitted rather than actively used!) but since kept as a replacement should the need arise, my service engineer at the last service advised not to use it as any insurance/safety related inspection would deem it unsafe due to age, even though effectively new, had it been fitted, he would have logged it on the service report as time expired!! It's not a concept I dismiss too lightly, the last pigtail I replaced was within it's 'life span' of 5 years but had become permeable and there was a strong smell of gas in the locker, so it DID need replacing.
For some items, the clock starts ticking from the date of manufacture, they deteriorate with age alone! My gas regulator, as is my smoke alarm, are due for replacement this year because of the date of manufacture which is a year or so before my van was built so couldn't have had the full service use, but still need replacing if not to be logged on the service report as out of date!
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06/3/2025 at 12:48pm
Location: London
Outfit: Lunar Cosmos 524
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My engineers head got to thinking about the 'recalibration' of Safefill and Gaslow type cylinders, and there's more to it than simply the pressure vessel aspect that also applies to rental cylinders from Calor etc.
User refillable cylinders have the 80% fill safety cut off valve which is a critical part of safe use. If a cylinder overfills and doesn't have that void at the top to allow the gas in liquid form to become vapour, there is the very nasty risk of supplying liquified gas to an appliance burner, with horrible fireball consequences! The 10 year recalibration would be the only time that feature would be properly inspected for correct function in the life of the cylinder!
Rental cylinders from Calor etc. don't need this feature as filled with a pre-metered quantity, so there is no risk of it ever failing in their case and putting the user at risk.
The more I think about it, the less inclined I'd be to continue using a refillable cylinder beyond it's 10 year life! All that said, it's incredibly rare to hear of any LPG related incidents, so one must assume it's not a huge risk, but beyond 10 years use without recalibration, you are definitely encroaching into the built in safety margins, with undoubtedly rising risk.
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