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In reply to Post #9
Hi, Coleman C500 canisters are steel not aluminium.
They rust in the top.
Plus test with a magnet, it sticks anywhere on em.
Bob
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In reply to Post #24
This is it, just shake/ warm the can, take off any wetsuit and you can empty it.
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In reply to Post #22
How little they cost...Baller..  
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In reply to Post #23
Why would anyone even consider disposing of a 25 % full gas cartridge ? You just use it until it's almost empty and then just place the canister in a bowl of hot water or use a USB heater to use the remaining gas. I'm truly flummoxed 🤔
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In reply to Post #22
Each to their own... But it honestly only takes a matter of minutes, and allows you to reclaim the 25% of gas in each can that would otherwise be thrown away.
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I personally cant see the point of getting the dregs out of a almost empty gas canister. Much easier just to buy a fresh new one for how little they cost.
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In reply to Post #20
Absolved of all liability 😁
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In reply to Post #19
Warning added 
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In reply to Post #1
I'm all for saving a bit of money here and there and don't want to piss on your parade ! However, this sort of practice could easily lead to disaster for anyone not fully aware of the risks. Even with all the info already posted, there will be people on here that don't fully understand what they are doing. I'm not saying that it can't be done, because obviously it can, but maybe this sort of thing shouldn't be advocated on a public forum without some form of legal disclaimer. Do the canisters not actually state - Do Not Refill ?
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In reply to Post #17
Does your adapter have any means to regulate pressure, ie a screw or valve built in?
If not... Just be careful running the stove at full bore when on propane. The extra pressure of propane could literally spurt liquid fuel out everywhere, ie all over a hot stove.
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In reply to Post #14
I have found the adaptor to connect my stove too 
I have two, but one won't seal, but an additional O ring would sort that if needed.
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In reply to Post #14
900g is about right, I've had them over a kilo without any issues. They have a pressure releif valve so you shouldn't be able to blow one up.
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In reply to Post #8
I do have a few coleman 1lb bottles so I can have a dabble with them.
I have the adaptor, but it isn't as straightforward as you have to unscrew to weigh it.
Can anyone tell me the weight of a filled coleman 1lb bottle...
I have marked the empty can with 421g, so about 15oz, and the full bottle should have 1lb of gas in it, so about 2lbs (32oz, 910g) full.
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The main takeaway is NOT to fill/refill them with pure propane.
It's highly dangerous, due to the increased vapor pressure of propane that is outside the safe working limits of the aluminium type camping cylinders that hold mostly butane.
They'd already be making them, and selling them to people who climb mountains in low temperatures - if it was safe to do so.
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In reply to Post #11
Yes, always read between the lines.. other adaptors are available.. but if you want to be Carpy. You go to Prolite explorer and pay the carpy tax.. there that carpy, they haven't even got the word carp in there shop name.
They will tell you there diffrent. But we all no otherwise.. 
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This refilling og gas cannisters seems to be all the rage now. I no JAG prolite have been pushing it with there flip fuel adaptor. Trying to encourage people to go light with smaller tins and not to waste fuel. They've done a vid online on how to do this. I believe there are also other vids available from the outdoor enthusiasts. I suppose pretty safe in the right hands.. Just waiting for the post on the Socials where a tin has gone pop in someone's face where they have over filled it.. My local club have banned people from throwing empty tins in the clubs bins. As the local refuse company are refusing to collect them. Obviously some sort of H&S issue there.. be safe people if your refilling..
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In reply to Post #8
Yeah that's a totally different ball game. They are steel canisters designed purely for propane, Vs the thin wall aluminium ones rated for mixed camping gases (Coleman C500 etc)
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In reply to Post #1
Get some of the green Coleman 1lb bottles which are 100% propane when bought, plenty of vids on the tube, I've been filling them for years.
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In reply to Post #6
This is risky heath Robison **** - all to save literally a few ££££
While the maths may work the fact is you are re-pressuring a canister that is a once use item and made as cheaply as possible
Don’t do it kids
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In reply to Post #5
Just with the dregs from other canisters of the same type.
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In reply to Post #2
I refill my cartridges, but ONLY ever with the exact same donor blend (70/30) of isobutane and propane
Where do you get the 70/30 mix from?
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In reply to Post #3
Those cylinders are rated for a pmax of approx 100 psi gauge pressure (+ some safety margin). With the normal 70/30 mix, that pmax is achieved at a temperature of around 50c
If you fill it with 100% propane, it's more like 15c
Your choice... But I wouldn't do it, and others should know the risks.
As for the failed stove picture, the cylinder has exploded underneath and then driven the stove into the bottom of the cooking pot, is how I view it.
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In reply to Post #2
I have read through both links, and all the comments.
One of the comments in the top link:
But take a look at the picture you've provided. Pretend you had a canister full of propane connected to a remote canister stove with a pot on it and a windscreen around the pot and stove (or maybe without a windscreen). Take a pick - what would the damage look like? And why does it look like an elephant stood on it?
My guess it's not propane being the main reason here. More likely someone thought it would be smart to put a canister on top of a pot or even in the water in it. You can pretty much do the math to sum it up. Explosion and the pressure pushed the pot to the ground smashing it together with the stove. If the canister was not on top but nearby, the damage would be from a side and parts would be around, not squeezed from above. Just my $0.02.
So, while these guys are expressing caution it really isn't a certain death...
The guy who replied says the stove looks like it has been squashed from above! If normal use then the gas can would be along side the stove.
He speculated that the gas can has been on top of the stove for some mad reason...
I'm not sure what the pressure difference is between the large propane tank and the c500 cans, but the small thin plastic tube that allows the transfer certainly doesn't bulge or burst, so it's unlikely to be approaching critical mass!
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Refilling gas canisters.
I have read lots of info on this, bought the bits ages ago and today I have finally refilled some cans...
I usually buy coleman c500 cans, six for about £25. They are 70% butane and 30% propane. The butane is cheaper, and the propane allows the butane to burn better at lower temperatures.
I have had a propane tank in the shed for a few years and having a go refilling was long overdue. My bulin gas stove will run very well on the 100% propane
The full c500 is about 620g, they contain about 440g of gas, so the empty can is about 180g.
The connecting hose is available on ebay for about £10, picture below.
When I screwed mine onto the large propane tank it didn't fully seal when turning by hand so I was unsure what to do. I got the plumbing pliers on it but the poor quality China metal was coming apart. The outer part of the screw fitting was just spinning so I had to hammer it off. This allowed me to grip the remaining section with the pliers and fully tighten.
I put the two empty cans into the freezer for 10 minutes to compress the remaining bits of gas as this supposedly allows a better refill.
I closed the valve on the fitting that fits onto the c500 can, and opened the valve on the tank, all OK, so tested the other end and it was feeding gas OK.
I fitted to the c500 can and opened the valve and you can hear the gas flow.
An occasional shake gives an indication if how much it has filled.
You can close and disconnect the valve and then weight the c500 can to check just how filled it is. Knowing a new one will weigh 620g you can fill to this level.
I filled a couple that had been in the freezer to about 600g, and then found a bag of empty cans. I hadn't chilled these but thought I'd give it a go and they filled to 550g or more so that's well good enough.
You can also get a small valve that allows you to transfer the odd bits of gas that remains in used cans into another, this is about £5, picture added.
Please make sure you consider any and all risks, or just don't do it.
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