O2 Injection Rod O-Ring Placement

***ScubaDadMiami*** · 18th November 2008, 16:53

In what position were you taught to place the o-ring for the Extend Air Cartridge when assembling your Optima?

diverreb · 18th November 2008, 18:09

I was taught to put the EAC in first, then slide the O-Ring on. The reason I continue doing it that way is I like having a visual on it, knowing it is sealed & in place.... It's more or less automatic for me.... I see no reason to change.

Having it on the back end & not knowing if it's completely in place or looking at the EAC before I close it up & wondering if I remembered to pop the O-ring on just doesn't work for me...

As far as dropping or loosing the O-Ring, I have tons of them in my spares kit. Bought a bunch from McMaster Carr. They cost next to nothing....

Richie

zmcave · 18th November 2008, 18:13

I learned with the old metal rod... but, once I got the upgrade I used it on top of the cartridge, just because I thought it was better... later I was "taught" at the factory to put it first and then slide the cartridge. Still do it and teach that way.

Best,

Zé.

jiseson · 18th November 2008, 18:38

Quote: (Originally Posted by diverreb)

I was taught to put the EAC in first, then slide the O-Ring on. The reason I continue doing it that way is I like having a visual on it, knowing it is sealed & in place.... It's more or less automatic for me.... I see no reason to change.

Having it on the back end & not knowing if it's completely in place or looking at the EAC before I close it up & wondering if I remembered to pop the O-ring on just doesn't work for me...

As far as dropping or loosing the O-Ring, I have tons of them in my spares kit. Bought a bunch from McMaster Carr. They cost next to nothing....

Richie

you use it on the bottom of the cartridge? makes sense

diverreb · 18th November 2008, 18:45

Quote: (Originally Posted by jiseson)

you use it on the bottom of the cartridge? makes sense

On the side facing out, after the EAC is first inserted...

Richie

JCdesign97 · 18th November 2008, 18:55

Based on the poll results it looks like I'm the first one to say that I was taught that either way works just as well. That's not entirely accurate - in training we were taught to put the EAC in first and then the o-ring after, visually verifying that it's plugging the center tube as Richie indicated. Later on when people started talking about putting the o-ring in first it made equal sense to me, so I started doing it that way on my own. One thing I do to make sure that there isn't a gap at the bottom (and also to verify that the o-ring is in fact still there) every time I assemble the unit is to pull the o-ring back up the tube by an inch or so. That way when you slide the EAC in place you feel the extra resistance for that last inch and know that the o-ring ended up firmly pressed against the bottom of the center tube every time. And if you really want to belt-and-suspenders it you can put another o-ring on the back end, as well! :D

diverreb · 18th November 2008, 19:57

Quote: (Originally Posted by JCdesign97)

Based on the poll results it looks like I'm the first one to say that I was taught that either way works just as well. That's not entirely accurate - in training we were taught to put the EAC in first and then the o-ring after, visually verifying that it's plugging the center tube as Richie indicated. Later on when people started talking about putting the o-ring in first it made equal sense to me, so I started doing it that way on my own. One thing I do to make sure that there isn't a gap at the bottom (and also to verify that the o-ring is in fact still there) every time I assemble the unit is to pull the o-ring back up the tube by an inch or so. That way when you slide the EAC in place you feel the extra resistance for that last inch and know that the o-ring ended up firmly pressed against the bottom of the center tube every time. And if you really want to belt-and-suspenders it you can put another o-ring on the back end, as well! :D

You and I are clearly in the minority here.... Mavericks! :D

Richie

HaisaiMatt · 18th November 2008, 20:12

I have always placed the O-ring at the top, so I could see it. Recently though I slid a couple of spare ones down near the solenoid, so when I loose mine another is right there ready for me. I did try to align one at the bottom to sit against the bottom of the cartridge, but still ensure the seal at the top.

Matt

JCdesign97 · 18th November 2008, 20:35

Quote: (Originally Posted by diverreb)

You and I are clearly in the minority here.... Mavericks! :D

Richie

Butch Canister and the Scrubber Kid ...

**Dsix36** · 18th November 2008, 22:05

I was taught to put the o-ring on first, then install the extendaire. I always slide the o-ring up the tube about an inch to insure that it will seal with the new cartridge.

Never loss the o-ring when I never remove it. :D

View Poll Results: Where do you place the o-ring on the O2 injection rod?
Place O-Ring first, then slide on the EAC;	18	75.00%
Slide on the EAC, then place O-ring;	3	12.50%
I was taught that either option works just as well.	3	12.50%
Voters: 24. You may not vote on this poll

18th November 2008, 16:53	#1 (permalink)
*ScubaDadMiami* Moderator Current Rebreather/s: Optima Other Rebreather/s: Join Date: Sep 2005 Location: Florida, USA Posts: 2,421	O2 Injection Rod O-Ring Placement In what position were you taught to place the o-ring for the Extend Air Cartridge when assembling your Optima? __________________ Howard Packer IANTD CCR Instructor Miami Beach, Florida CCRDiveTraining.com
(Online)

18th November 2008, 18:09	#2 (permalink)
diverreb DE/MD/NJ Wreck Diver Current Rebreather/s: Optima Other Rebreather/s: Join Date: Mar 2007 Location: Dover, DE Posts: 893	Re: O2 Injection Rod O-Ring Placement I was taught to put the EAC in first, then slide the O-Ring on. The reason I continue doing it that way is I like having a visual on it, knowing it is sealed & in place.... It's more or less automatic for me.... I see no reason to change. Having it on the back end & not knowing if it's completely in place or looking at the EAC before I close it up & wondering if I remembered to pop the O-ring on just doesn't work for me... As far as dropping or loosing the O-Ring, I have tons of them in my spares kit. Bought a bunch from McMaster Carr. They cost next to nothing.... Richie
(Online)

18th November 2008, 18:13	#3 (permalink)
zmcave www.rebreather.com.br Current Rebreather/s: Optima Dolphin Other Rebreather/s: Optima Dolphin Join Date: Apr 2006 Location: Brazil Posts: 196	Re: O2 Injection Rod O-Ring Placement I learned with the old metal rod... but, once I got the upgrade I used it on top of the cartridge, just because I thought it was better... later I was "taught" at the factory to put it first and then slide the cartridge. Still do it and teach that way. Best, Zé.
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18th November 2008, 18:38	#4 (permalink)
jiseson Banned Current Rebreather/s: Optima Other Rebreather/s: Join Date: Jun 2006 Location: long island,ny Posts: 828	Re: O2 Injection Rod O-Ring Placement Quote: (Originally Posted by diverreb) I was taught to put the EAC in first, then slide the O-Ring on. The reason I continue doing it that way is I like having a visual on it, knowing it is sealed & in place.... It's more or less automatic for me.... I see no reason to change. Having it on the back end & not knowing if it's completely in place or looking at the EAC before I close it up & wondering if I remembered to pop the O-ring on just doesn't work for me... As far as dropping or loosing the O-Ring, I have tons of them in my spares kit. Bought a bunch from McMaster Carr. They cost next to nothing.... Richie you use it on the bottom of the cartridge? makes sense
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18th November 2008, 18:45	#5 (permalink)
diverreb DE/MD/NJ Wreck Diver Current Rebreather/s: Optima Other Rebreather/s: Join Date: Mar 2007 Location: Dover, DE Posts: 893	Re: O2 Injection Rod O-Ring Placement Quote: (Originally Posted by jiseson) you use it on the bottom of the cartridge? makes sense On the side facing out, after the EAC is first inserted... Richie
(Online)

18th November 2008, 18:55	#6 (permalink)
JCdesign97 My unit can beat up yours Current Rebreather/s: Optima Other Rebreather/s: Join Date: Mar 2007 Location: PA, USA Posts: 501	Re: O2 Injection Rod O-Ring Placement Based on the poll results it looks like I'm the first one to say that I was taught that either way works just as well. That's not entirely accurate - in training we were taught to put the EAC in first and then the o-ring after, visually verifying that it's plugging the center tube as Richie indicated. Later on when people started talking about putting the o-ring in first it made equal sense to me, so I started doing it that way on my own. One thing I do to make sure that there isn't a gap at the bottom (and also to verify that the o-ring is in fact still there) every time I assemble the unit is to pull the o-ring back up the tube by an inch or so. That way when you slide the EAC in place you feel the extra resistance for that last inch and know that the o-ring ended up firmly pressed against the bottom of the center tube every time. And if you really want to belt-and-suspenders it you can put another o-ring on the back end, as well! :D Last edited by JCdesign97 : 18th November 2008 at 19:04.
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18th November 2008, 19:57	#7 (permalink)
diverreb DE/MD/NJ Wreck Diver Current Rebreather/s: Optima Other Rebreather/s: Join Date: Mar 2007 Location: Dover, DE Posts: 893	Re: O2 Injection Rod O-Ring Placement Quote: (Originally Posted by JCdesign97) Based on the poll results it looks like I'm the first one to say that I was taught that either way works just as well. That's not entirely accurate - in training we were taught to put the EAC in first and then the o-ring after, visually verifying that it's plugging the center tube as Richie indicated. Later on when people started talking about putting the o-ring in first it made equal sense to me, so I started doing it that way on my own. One thing I do to make sure that there isn't a gap at the bottom (and also to verify that the o-ring is in fact still there) every time I assemble the unit is to pull the o-ring back up the tube by an inch or so. That way when you slide the EAC in place you feel the extra resistance for that last inch and know that the o-ring ended up firmly pressed against the bottom of the center tube every time. And if you really want to belt-and-suspenders it you can put another o-ring on the back end, as well! :D You and I are clearly in the minority here.... Mavericks! :D Richie
(Online)

18th November 2008, 20:12	#8 (permalink)
HaisaiMatt RBW Member Current Rebreather/s: Optima Other Rebreather/s: Join Date: May 2007 Location: San Diego Posts: 25	Re: O2 Injection Rod O-Ring Placement I have always placed the O-ring at the top, so I could see it. Recently though I slid a couple of spare ones down near the solenoid, so when I loose mine another is right there ready for me. I did try to align one at the bottom to sit against the bottom of the cartridge, but still ensure the seal at the top. Matt
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18th November 2008, 20:35	#9 (permalink)
JCdesign97 My unit can beat up yours Current Rebreather/s: Optima Other Rebreather/s: Join Date: Mar 2007 Location: PA, USA Posts: 501	Re: O2 Injection Rod O-Ring Placement Quote: (Originally Posted by diverreb) You and I are clearly in the minority here.... Mavericks! :D Richie Butch Canister and the Scrubber Kid ...
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18th November 2008, 22:05	#10 (permalink)
Dsix36 Going Down? Current Rebreather/s: rEvo Other Rebreather/s: Optima rEvo Join Date: Aug 2007 Location: Deerfield Beach, Florida Posts: 1,669	Re: O2 Injection Rod O-Ring Placement I was taught to put the o-ring on first, then install the extendaire. I always slide the o-ring up the tube about an inch to insure that it will seal with the new cartridge. Never loss the o-ring when I never remove it. :D __________________ THE MORE THAT I LEARN, THE MORE THAT I STILL NEED TO LEARN!!!!!!
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