What grade of O2 do you use?

RebreatherNut · 8th November 2007, 00:42

As the title states, What grade of O2 do you use?

jkaterenchuk · 8th November 2007, 01:12

In our area there is another type called GMP...short for good manufacturing practises. You need a Rx from a doctor to get Medical.

**wedivebc** · 8th November 2007, 02:04

Quote: (Originally Posted by jkaterenchuk)

In our area there is another type called GMP...short for good manufacturing practises. You need a Rx from a doctor to get Medical.

Same here, Praxair calls it "divers grade"

**jstovall** · 8th November 2007, 02:51

Use aviator grade. Get it at the local welding supply store. H cylinder costs about $17 bucks minus cylinder rental. Aviator grade is the most pure, i think, and dry. Wouldn't use any other, the price is right.

JS1scuba · 8th November 2007, 03:07

Praxair Technical Diving Grade

diverreb · 8th November 2007, 03:24

I use Roberts Oxygen and until this year I got Medical O2 from them. This year they switched me over to GMP claiming they only now sell Medical O2 to Doctor's Offices, Hospitals, and Nursing Homes. They said even if I got an Rx they couldn't sell it to me. Some type of Government Regulation now being enforced was the explanation I got.

After a long conversation with their head of QC he explained that the only difference between the Medical O2 & GMP was the paint job on the bottles as far as the way the cylinders are handled & filled. They go down the same line. I haven't had any issues using it.

I figured since it wasn't "Medical" grade that it would be a little cheaper. Some how they managed to increase the price a little.

I'm now paying about $24.00 US for a cylinder plus an annual fee of $40.00 for bottle rental. What's really taking a hike is the He. Used to be $60.00 a bottle. My last load was $74.00. Glad I'm no longer filling double 120's!

Richie

Joe · 8th November 2007, 03:29

Quote: (Originally Posted by diverreb)

I use Roberts Oxygen and until this year I got Medical O2 from them. This year they switched me over to GMP claiming they only now sell Medical O2 to Doctor's Offices, Hospitals, and Nursing Homes. They said even if I got an Rx they couldn't sell it to me. Some type of Government Regulation now being enforced was the explanation I got.

After a long conversation with their head of QC he explained that the only difference between the Medical O2 & GMP was the paint job on the bottles as far as the way the cylinders are handled & filled. They go down the same line. I haven't had any issues using it.

I figured since it wasn't "Medical" grade that it would be a little cheaper. Some how they managed to increase the price a little.

I'm now paying about $24.00 US for a cylinder plus an annual fee of $40.00 for bottle rental. What's really taking a hike is the He. Used to be $60.00 a bottle. My last load was $74.00. Glad I'm no longer filling double 120's!

Richie

There is a special place in Hell for Gas Suppliers and Car Dealers ............

Lancer4545 · 8th November 2007, 04:29

Yikes.....I am shocked there are some of you diving with welding grade O2.....Not good!!!

I use Aviators Breathing O2.....It's the most pure, dry and comes in a 250bar G size tank.

Lance

**wedivebc** · 8th November 2007, 04:33

Quote: (Originally Posted by Lancer4545)

Yikes.....I am shocked there are some of you diving with welding grade O2.....Not good!!!

I use Aviators Breathing O2.....It's the most pure, dry and comes in a 250bar G size tank.

Lance

I know this has been discussed to death but when I asked my Praxair guy about purity he laughed. It all comes out of the same tank. Some has higher purity requirements such as welding grade must be very pure, but aviatorsz grade is rated for low dew point not any more pure than USP or medical grade. Bottom line is it's all the same.

**nigelh** · 8th November 2007, 06:15

I use Air Product's diving grade.

In the UK the difference between the grades is mostly down to the tracability paperwork that follows it about. I asked and was told it all comes out of the same tank, so I asked about filling processes and was told there was only one and it was fully automatic. Apparantly it is more expensive to have two processes and control how you switch between them than just have one blanket set of rules. ISO9000 wins again.

View Poll Results: What grade/type of O2 do you use?
Medical	58	39.46%
Aviator	39	26.53%
Welding	36	24.49%
other?	14	9.52%
Voters: 147. You may not vote on this poll

8th November 2007, 00:42	#1 (permalink)
RebreatherNut Rebreather World Greeter Current Rebreather/s: Sport Kiss Ray Other Rebreather/s: Ray Join Date: Apr 2005 Location: Pacific Northwest Posts: 691	What grade of O2 do you use? As the title states, What grade of O2 do you use? __________________ "One minute to go, Luck-meister! Then I'll be down on you like a buzzard on a gut wagon." - ALF
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8th November 2007, 01:12	#2 (permalink)
jkaterenchuk . Current Rebreather/s: Inspiration Classic Megalodon Classic Kiss Other Rebreather/s: Join Date: May 2006 Location: Lititz, PA Posts: 750	Re: What grade of O2 do you use? In our area there is another type called GMP...short for good manufacturing practises. You need a Rx from a doctor to get Medical.
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8th November 2007, 02:04	#3 (permalink)
wedivebc FIGJAM Current Rebreather/s: Megalodon Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Other CCR Join Date: Feb 2005 Location: Vancouver Island BC Canada Posts: 1,411	Re: What grade of O2 do you use? Quote: (Originally Posted by jkaterenchuk) In our area there is another type called GMP...short for good manufacturing practises. You need a Rx from a doctor to get Medical. Same here, Praxair calls it "divers grade" __________________ Cheers, Dave.... Man is the only animal burdened with the knowledge he will eventually die
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8th November 2007, 02:51	#4 (permalink)
jstovall Supporting Member Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Apr 2006 Location: New Braunfels, TX Posts: 55	Re: What grade of O2 do you use? Use aviator grade. Get it at the local welding supply store. H cylinder costs about $17 bucks minus cylinder rental. Aviator grade is the most pure, i think, and dry. Wouldn't use any other, the price is right.
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8th November 2007, 03:24	#6 (permalink)
diverreb DE/MD/NJ Wreck Diver Current Rebreather/s: Optima Other Rebreather/s: Join Date: Mar 2007 Location: Dover, DE Posts: 568	Re: What grade of O2 do you use? I use Roberts Oxygen and until this year I got Medical O2 from them. This year they switched me over to GMP claiming they only now sell Medical O2 to Doctor's Offices, Hospitals, and Nursing Homes. They said even if I got an Rx they couldn't sell it to me. Some type of Government Regulation now being enforced was the explanation I got. After a long conversation with their head of QC he explained that the only difference between the Medical O2 & GMP was the paint job on the bottles as far as the way the cylinders are handled & filled. They go down the same line. I haven't had any issues using it. I figured since it wasn't "Medical" grade that it would be a little cheaper. Some how they managed to increase the price a little. I'm now paying about $24.00 US for a cylinder plus an annual fee of $40.00 for bottle rental. What's really taking a hike is the He. Used to be $60.00 a bottle. My last load was $74.00. Glad I'm no longer filling double 120's! Richie
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8th November 2007, 03:29	#7 (permalink)
Joe Custom Title Allowed! Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Oct 2005 Location: Florida, USA Posts: 249	Re: What grade of O2 do you use? Quote: (Originally Posted by diverreb) I use Roberts Oxygen and until this year I got Medical O2 from them. This year they switched me over to GMP claiming they only now sell Medical O2 to Doctor's Offices, Hospitals, and Nursing Homes. They said even if I got an Rx they couldn't sell it to me. Some type of Government Regulation now being enforced was the explanation I got. After a long conversation with their head of QC he explained that the only difference between the Medical O2 & GMP was the paint job on the bottles as far as the way the cylinders are handled & filled. They go down the same line. I haven't had any issues using it. I figured since it wasn't "Medical" grade that it would be a little cheaper. Some how they managed to increase the price a little. I'm now paying about $24.00 US for a cylinder plus an annual fee of $40.00 for bottle rental. What's really taking a hike is the He. Used to be $60.00 a bottle. My last load was $74.00. Glad I'm no longer filling double 120's! Richie There is a special place in Hell for Gas Suppliers and Car Dealers ............
(Online)

8th November 2007, 04:29	#8 (permalink)
Lancer4545 Closed Circuit Divers Aus Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Jun 2007 Location: Cairns QLD Australia Posts: 615	Re: What grade of O2 do you use? Yikes.....I am shocked there are some of you diving with welding grade O2.....Not good!!! I use Aviators Breathing O2.....It's the most pure, dry and comes in a 250bar G size tank. Lance __________________ You can run but you can't hide! ISC Appointed Megalodon Dealer for East Australia http://www.closedcircuitdivers.com.au info@closedcircuitdivers.com.au
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8th November 2007, 04:33	#9 (permalink)
wedivebc FIGJAM Current Rebreather/s: Megalodon Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Other CCR Join Date: Feb 2005 Location: Vancouver Island BC Canada Posts: 1,411	Re: What grade of O2 do you use? Quote: (Originally Posted by Lancer4545) Yikes.....I am shocked there are some of you diving with welding grade O2.....Not good!!! I use Aviators Breathing O2.....It's the most pure, dry and comes in a 250bar G size tank. Lance I know this has been discussed to death but when I asked my Praxair guy about purity he laughed. It all comes out of the same tank. Some has higher purity requirements such as welding grade must be very pure, but aviatorsz grade is rated for low dew point not any more pure than USP or medical grade. Bottom line is it's all the same. __________________ Cheers, Dave.... Man is the only animal burdened with the knowledge he will eventually die
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8th November 2007, 06:15	#10 (permalink)
nigelh New Member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Mar 2005 Location: Brighton, Sussex, UK Posts: 825	Re: What grade of O2 do you use? I use Air Product's diving grade. In the UK the difference between the grades is mostly down to the tracability paperwork that follows it about. I asked and was told it all comes out of the same tank, so I asked about filling processes and was told there was only one and it was fully automatic. Apparantly it is more expensive to have two processes and control how you switch between them than just have one blanket set of rules. ISO9000 wins again. __________________ nigelh
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