£600 is a lot of money for that…
Between €150 and €200, depending on hose type and the quality of the gauge. It’s important to be oxygen compatible and clean.
Emir wrote:
Between €150 and €200, depending on hose type and the quality of the gauge. It’s important to be oxygen compatible and clean.
Surely this would be okay?
[ link cleaned up and the huge syndication URL trimmed :) ]
Peter wrote:
A decent quality gauge is about £100-150. The rest… there is a bit of labour in making up the hose. But a scuba shop selling trimix will be doing this regularly.
Just found it on that website. You paid £134 + VAT? Incl VAT this will set me back Incl. VAT: £589.31
https://undersea-centre.com/hose-assemblies/oxygen-de-canting-assembly-com
That looks like the previous kit. You need to get the right output connector.
That hose looks low pressure; you need 3000psi rated.
Peter wrote:
You can kill yourself; 3000psi will produce flying objects with mach3+ speeds.
I did a DIY transfill adapter as nothing was available and did learn a few lessons. I actually had a prototype not hold the pressure but this was a non event. The very important point is not the pressure but the volume involved. If a tiny connection with its internal volume depressurizes, even at high pressure, not much happens. If somehow the volume of one of the bottles gets involved it can get very bad. My take on this was to isolate both bottles. The giving bottle was opened only a tiny bit. This is enough to transfill slowly but if anything goes bad not much volume will escape and you quickly close the bottle. On the receiving side my bottle has got a one direction check valve anyway. So even if the transfill adapter breaks nothing will “backfire”.
I would try those guys. They have a wide selection and if it is not on the list they seem to be able to make the right part. Prices are also acceptable:
Also note how they seem to to avoid long flexible hoses but prefer short metal tubes for the transfill. Do not buy any standard oxygen hoses etc. nearl everything is designed to work behind a pressure regulator at a few bar but that is not what you want when you transfill, been there…
I’ve just had a reply from one firm yesterday. They’ve given me the following;
Blending whip with bleed, gauge and valve https://www.narkedat90.com/bwag-blending-whip-with-analogue-gauge.html
Bullnose adaptor https://www.narkedat90.com/bnuk232-male-uk-bullnose-232-bar-female-din.html
+ can fit this – https://www.narkedat90.com/bwag-blending-whip-with-analogue-gauge.html
They’ve said they’ll clean the hose for o2 use or make me the connection required.
Only downside is it’s 2m and the bottle is 2m so I am gonna have issues filling the Av Bottle unless I do it on a 1m high stall. I guess that works?
Still looking at £300 mark… Thoughts? @Peter
The BOC cylinder is not 2m high. It is about 1.5m high.
300 quid is fine. Half of it is the gauge.
You need to make sure the other end of the hose fits the MH cylinder (540 thread or DIN thread) and then you are done.
Let me know how you get on so I can update that oxygen article. A vast number of people follow it 
No idea what they mean by “clean the hose for 02 use”.
@Sebastian_G where did you get the one-way valve?
Peter wrote:
No idea what they mean by “clean the hose for 02 use”.
All equipment used for manipulating pure oxygen (essentially any mix with more than 40% of oxygen) have to be made of oxygen compatible materials. In addition, it has to be “oxygen clean” which means all oxygen non-compatible deposits (grease and similar) have to be removed from surfaces prior to use.
I thought the main job was using o2-compatible materials (and avoiding most types of grease etc) not flush dirty hoses with some solvent
