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#58
 Oceanic CDx + Other Second stage
LeoPerez - 4/20/2025 9:50 PM
Category: Equipment
Replies: 3
Hi everyone,

I’m currently using an Oceanic CDX first stage, which is a sealed diaphragm regulator. My second stage is an Oceanic Alpha 10, but unfortunately, the exhaust diaphragm recently failed and I’m having a hard time replacing it.

I live in Colombia, and Oceanic doesn’t have an official dealer or service center here, so getting original spare parts has been quite a challenge — supply chains for Oceanic are not the most reliable in this region.

I’m now considering replacing the second stage with one from a more common brand in my country, such as Scubapro, Mares, or Aqualung, whose parts and servicing are much easier to find locally.

👉 My questions are:

1. Is it safe and technically sound to pair the Oceanic CDX first stage with a second stage from another manufacturer?

2. Have any of you tried similar combinations? Any brands/models you’d recommend?

3. Would I need to adjust the intermediate pressure or retune the second stage?

4. Are there performance, safety, or warranty considerations I should be aware of?

Any input or shared experiences would be greatly appreciated! I’m looking for a reliable and maintainable setup without having to replace the entire regulator system.

Thanks in advance!
#12856
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Eric_R - 8 days 22 hours ago.
I was running a Mares MR12 III second on an Apex first until this year. Work great! It seems parts aren’t available for that old of a Mares so I bought some more Apex regs to retire my 38 year old Mares.
#21217
LatitudeAdjustment - 5 days 1 hour ago.
There is a Swedish brand that uses a different IP but everyone else is pretty much mix and match.
I’m using an Oceanic 1st stage with a brand x 2nd.
On my deco stage bottle is an old US Divers 1st with an Oceanic 2nd and no the Oceanic reg doesn’t make that US Divers breath any better :(
#58
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LeoPerez - 3 days 1 hour ago.
Hi, thanks for your comments. I bought a SEAC 2nd stage this weekend, and yesterday, I tried it in a pool. So far, it worked nicely, with no real difference between the oceanic and SEAC. I will let you know how it works when trying in salty waters.