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Many surgeons don't restrict activity after laparoscopic/robotic surgery, but one of the most common incisional hernias that I fix is a hernia in a laparoscopic/robotic incision when the patient wasn't restricted after their surgery. After laparoscopic surgery, I give patients three...

Thanks. I contacted Aqualung too and even they didn't know (or wouldn't say?) what the correct o-ring is for that computer.

Anyone know the specifications for the battery compartment o-ring for the old US Divers Scan 4 air integrated dive computer? Size/recommended material/hardness? Thanks

Please note that this is meant as a DIM (Did It Myself- some will probably say DIM-witted) post and is not meant as an endorsement or recommendation for anyone else to do the same. Pressure vessels are inherently dangerous, and essentially none of the components used in this project were used...

I'm a just newbie who celebrated his 30th year diving last July. Seems like everything sold in the shops was plastic by then. That's why I asked here- so that the experienced divers could answer! Thanks

Lots of good info. Thanks to all!

Thanks northernone Yeah, I knew that you could still get a J-valve if you want one. I was asking more about when in the days before online sales your local shop wouldn't typically sell a cylinder with a J-valve and you would have to special order it. (And maybe they'd scratch their head a...

When would you say that K-valves became the clear standard in the marketplace and replaced J-valves to the point that you would have had a hard time buying a new tank with a J-valve? And when would you say the same thing about plastic cylinder valve knobs replacing metal knobs (on even...

They were 1/2AA, 3.6v, lithium batteries.

Thanks SoCalSwami. The BCD arrived yesterday and is exactly as advertised. My son tried it in the pool this afternoon, and everything checks out great. To other Scubaboard members: You'll see that SoCalSwami sometimes sells scuba items in this classified section. He responded promptly, was...

I imagine that we'll never know exactly what happened, but the discussion is interesting. As I mentioned, I didn't find any water in either battery compartment, just the brownish crud, that was moist, and the total absence of the positive terminals. I don't think that there was a sudden massive...

Hi Scubagaskets: I'm sorry that you took offense to my response to your post in my thread. Obviously ScubaGaskets is a labor of love for you that you take very seriously. You can be proud of it. Unlike some discussion sites where any form of advertising in threads is frowned upon or even...

I seem remember reading in the past that at least some computers need to be immersed in water when under pressure. True? Addendum: A search of my computers' manual says: Do not test or use the [dive computer] in pressurized air And a quick Google search found this warning in the Oceanic...

It makes sense that you pressure test a computer to deeper than you plan to dive, just as you would buy a dive watch rated to deeper than your deepest dive. My deepest dive was a little over 100' on this trip. My computers claim they are engineered to dive to 325'. I wonder how many computers...

Thanks Scubagaskets. I used your site as a resource to try to find o-rings for my computers. I didn't find my computers listed, which isn't surprising considering their age, but I did find the right size. Today those o-rings list for 11.50€ for 50 o-rings plus 8.00€ shipping or 19.50€. I didn't...

Yeah, I'd have to say that there was a user error by the LDS. Whether they installed the o rings wrong, erred in not replacing the o rings with new ones, or should have done like other dive shops and refused to touch the computers if they were uncomfortable. The Level 2 service center that...

Hi DIVEWATCHDOCTOR. The battery compartments were isolated and the electronics compartments did not flood. I looked through the compartments' "windows" after the battery changes and did not see any water from the pressure tests, but I suppose that there could have been a small amount. On the...

Thanks DIVEWATCHDOCTOR. I agree that reusing the o rings was the cause of the failures. I imagine that they not only become compressed and warped over time, but also could change in hardness if old enough. I actually already have replacement o rings now. Lesson learned. I'll be posting that...

Maybe I need one of those. My wife thinks that we have "communication problems". She says that I don't listen. I tell her, "Sure I do. Just ask the TV." She starts eeevery conversation we have the saaaame way, "You haven't heard a word I've said, have you!?"

Background: I have 3 old dive computers that I still use, but are no longer supported by the manufacturer (ie- they no longer supply battery kits). My LDS changed the batteries right before a recent trip, but did not change the o-rings for the battery compartments because they could not get them...