New Cylinders - O2 Clean?

[MartinS]

OK, now I'm sure I know the answer, but just want to check
I'm looking for a single 12L, and 'that shop' (you know the one I mean) are the cheapest, especially considering they include a MDE valve. I called Kent, and their standard 12L, although cheaper, does not include an MDE valve, and they want another £10 if I decide I want an MDE valve included. Now, surely, a new cylinder is, by default, O2 clean - so if I buy one without the O2 clean tax of £5, and stick an O2 clean sticker myself on it, is that reasonable? I've yet to source an O2 clean sticker, which may well cost me a fiver, but just want clarification that I'm correct in my assumption.
Regards
Martin

[Janos]

It depends what they use to lube the o-ring when they put the tank together. Obviously you should use O2 grease on the neck o-ring if you want it O2 clean.

Janos

[MartinS]

Originally Posted by Janos

It depends what they use to lube the o-ring when they put the tank together. Obviously you should use O2 grease on the neck o-ring if you want it O2 clean.

Janos

Ahh - OK, didn't realise that!
Should probably not be so stingy and pay the extra fiver!
Cheers Janos
Martin

[Prometheus]

Originally Posted by Janos

It depends what they use to lube the o-ring when they put the tank together. Obviously you should use O2 grease on the neck o-ring if you want it O2 clean.

Janos

I'm sure there is a reason (probably cost) but why wouldn't you assemble at the highest level of use rather than the lowest, have I answered my own question?.

[Steve S]

Originally Posted by MartinS

OK, now I'm sure I know the answer, but just want to check
I'm looking for a single 12L, and 'that shop' (you know the one I mean) are the cheapest, especially considering they include a MDE valve. I called Kent, and their standard 12L, although cheaper, does not include an MDE valve, and they want another £10 if I decide I want an MDE valve included. Now, surely, a new cylinder is, by default, O2 clean - so if I buy one without the O2 clean tax of £5, and stick an O2 clean sticker myself on it, is that reasonable? I've yet to source an O2 clean sticker, which may well cost me a fiver, but just want clarification that I'm correct in my assumption.
Regards
Martin

AFAIC nothing wrong at all as long as the cylinder is 02 clean from the manufacturer,[be aware some use silicone grease for the tank oring rather than christolube] the problem is that you will be at the 'mercy' of the dive shops as to whether you get a fill or not my LDS has recently put a sign up saying no nitrox fills in either non recognised clean stickers or those with just a mobile or web address.

Safe diving,
Steve

[MATTBIN]

Given they lube the O ring, do they, then I cant see why its £5 more for one tank than another, my understanding was all NEW tanks are O2 clean.

Matt

[Janos]

Originally Posted by Prometheus

I'm sure there is a reason (probably cost) but why wouldn't you assemble at the highest level of use rather than the lowest, have I answered my own question?.

A cynic would say it depends on whether you want to charge people an extra tenner for an O2 clean tank or not.

Janos

[MartinS]

Originally Posted by Steve S

AFAIC nothing wrong at all as long as the cylinder is 02 clean from the manufacturer, the problem is that you will be at the 'mercy' of the dive shops as to whether you get a fill or not my LDS has recently put a sign up saying no nitrox fills in either non recognised clean stickers or those with just a mobile or web address.

Safe diving,
Steve

OK, thanks Steve. As you say, fine until your LDS, or one you need to get air from whilst away says no, then you are knackered.
OK, I'll pay the bloody fiver...
Martin

[fatone]

Totaly confused as to why a new cylinder would "by default" be O2 clean ? and what about the pillar valve ?
Most are, but thats because they have been cleaned and sealed, not because they are new, the manufacturing process is a dirty bussines for cylinders.
If everything revolves around the price though, i will say it's clean for £4.99 and knock out a sticker, but dont ask me to fill it ! I have some really cheap parachutes if it's any use to you ? not sure they will open though.

[MartinS]

Originally Posted by MATTBIN

Given they lube the O ring, do they, then I cant see why its £5 more for one tank than another, my understanding was all NEW tanks are O2 clean.

Matt

My assumption as well, but as Steve says, if you pop an unrecognised O2 clean sticker on it, they may (and do in Steve's case) say no to a nitrox fill.
Martin