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British Lung Foundation
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Buying used concentrator.

‘Mobile oxygen concentrator for sale by members.’

They are mostly sold here because of someone’s loss or that they are no longer suitable for purpose and we are grateful to the sellers.

My question is. On purchasing said concentrator.

How does one manage the replacement of new cannula, filters and above all regular maintenance plus the actual payment itself? Not all of us are quite sure or too trusting of Paypal.

In my case I would require it mailed to me in Wiltshire and people don’t seem to trust the old fashioned cheque any more. Yet us oldies must be the most trustworthy of all providing we are not called by our maker before it clears.

Trivial points perhaps, but when you consider the large sums of money involved quite pertinent.

Any assistance on this subject would be greatly appreciated. Thank you.

12 Replies


Cannula can be purchased cheaply from amazon, or any major company such as intermedical, pureO2.

They will also do repairs and service typical service £110 .

Payment is trust, bank transfer is most reliable , you can even do online transfers.

You could also arrange to meet half way at a suitable location,

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This is rather harsh..

The poster may want to purchase a portable machine to take on holiday. It can be complicated arranging for holiday oxygen as I have found out recently. You need to plan 4 weeks in advance and you need someone to be there to take it all in.

I am considering purchasing one myself for using during short breaks and I am most certainly NOT trying to 'justify benefit requirements'.

My post below reminds people, respectfully, that they must not use oxygen if they have not been prescribed it.


You are right, happyfeet, login's comment is indeed harsh, if not judgemental. I am prescribe and supplied with a concentrator but purchased a portable one for holidays - much easier and cheaper than renting abroad. Also, it is easier to carry when out shopping than the cylinders I am provided with for ambulatory use.



I am on Ambultory oxygen , the POC on offer was not suitable for my needs, so I purchased my own, Airsep focus.

The NHS unit is to heavy, living on the first floor, the only option is cylinders, awkward when claiming stairs with shopping ect,

The Focus is the lightest on the market 0.6kg.

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I would have bought the airsep focus if it had been suitable for me - such a neat machine, blow the cost! Unfortunately my ambulatory litreage is too high so I am doomed to using the dreaded cylinders!

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No one should be using oxygen if they haven't been prescribed it so you should have a concentrator, suitable for your needs, provided by your oxygen provider. I might buy a concentrator if I needed an extra one for convenience eg holidays.

It is VERY dangerous to use oxygen if you haven't been tested for it as you don't know what litreage is safe for you. The litreage provided by pulsed oxygen portable machines can be different from what you are prescribed for at home oxygen. Talk to your oxygen nurse before purchasing any machine to ensure it is suitable for you.

That said. If you purchase an extra eg portable concentrator, you can use the cannulae which are provided for your home machine. I am always given several spares by my oxygen provider.

Stone has suggested purchasing cannulae and has covered repairs and services. Filters, if one is needed can be bought from the manufacturer or sales companies.

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Eightyplus, if I was purchasing one I would want to see it first and would probably arrange to meet the seller somewhere, taking the cash for the sale with me, but not going alone. But I take your point about what difficulties may arise.


As always sound advice from members. I do have Ambultory oxygen but I find it almost impossible to refill with liquid oxygen and have no wish to be beholden or have to wait for someone to come along and do it for me.

I did have the cylinders, but there again, too heavy and as you all appreciate, our needs can be so different.

However would I be right in thinking that having been comfortable with 2 litres a minute pulse on my present 'Helios' that the portable models would automatically be suitable for my use?

As for concentrators being free yes they are, but not battery operated portable ones.

At least not by 'Liquidair', though they are available on loan for going on holiday.


I would ask the oxygen nurse about suitability of the portable model for your oxygen prescription before you buy. Some POC's have different litreage systems than cylinders/liquid oxygen.

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I, too, use ambulatory oxygen in tanks which can'[t be taken out of the country (allegedly) -- they certainly can't be taken on an aeroplane. I bought a concentrator so that I could visit family abroad; it can be used on the flight (saving lots of money!) and it means that I can get about while we are away.

The cannulae provided by my oxygen suppliers fit my concentrator so there's no problem there!




Again Thank you. It appears that the Cannula side is solved thanks to Catnip and the suggestion by happyfeet59 will be put to the nurse when she visits.


go one step further ...... if you harass them enough you should be able to get a concentrator off the NHS. I've got an Inogen-One from NHS Wales ...... I managed to pull it off because I travel & can often be away for days on end, so can't replenish cylinders.

I also have my own Airsep Focus, which I was using before I managed to get a concentrator from the NHS.

So, if anyone wants £2k's worth of good Airsep Focus with 4 good batteries & a load of new cannula's for around £900 then let me know before I get round to knocking up an advert ....... cheques accepted & I'll even go to Swindon - lol

It's the one that's the lightest concentrator available in the world .......



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