Which Apeks first stages for tech back mount
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Mike1967
Contributor
tmassey
Contributor
The nice thing about standards is there are so many to choose from.
The DGX page for the PU O-rings has a pretty good write up on the bottom. There's the original DIN (German, and therefore *metric*) standard. It uses specifically defined o-rings, that are unusual for *everyone*. Then there's the AS568 sizes that are close, and which people used because it's what they could get. Then there's the manufacturers who deviated from the DIN standard to better use the o-rings everyone was using. Then there was slight changes in the standard! So the answer of "what size o-ring does this reg use" is pretty metaphysical at this point.
But what I've found *works* in the Apeks regs (and their clones) are the DGX PU o-rings. At $5 for 5 they're not cheap, but in the grand scheme of things, they're not exactly a noticeable cost in the world of SCUBA... My regs are DGX by Deep6, but I've given those o-rings to Apeks users with the same problem. I'm pretty sure I've given them the same ones I used (112's), even though everything says they won't work.
Also, here's a link to McMaster-Carr for the true metric o-ring: McMaster-Carr . DGX has that size if you go into their Viton O-ring page and select the right item from the drop-down: 2.4x11.3. (They also have them in Nitrile, and Poseidon-branded -- for four times the cost!
)
I wish I could get the true DIN size in PU, but I haven't been able to find that yet.
The DGX page for the PU O-rings has a pretty good write up on the bottom. There's the original DIN (German, and therefore *metric*) standard. It uses specifically defined o-rings, that are unusual for *everyone*. Then there's the AS568 sizes that are close, and which people used because it's what they could get. Then there's the manufacturers who deviated from the DIN standard to better use the o-rings everyone was using. Then there was slight changes in the standard! So the answer of "what size o-ring does this reg use" is pretty metaphysical at this point.
But what I've found *works* in the Apeks regs (and their clones) are the DGX PU o-rings. At $5 for 5 they're not cheap, but in the grand scheme of things, they're not exactly a noticeable cost in the world of SCUBA... My regs are DGX by Deep6, but I've given those o-rings to Apeks users with the same problem. I'm pretty sure I've given them the same ones I used (112's), even though everything says they won't work.
Also, here's a link to McMaster-Carr for the true metric o-ring: McMaster-Carr . DGX has that size if you go into their Viton O-ring page and select the right item from the drop-down: 2.4x11.3. (They also have them in Nitrile, and Poseidon-branded -- for four times the cost!
)I wish I could get the true DIN size in PU, but I haven't been able to find that yet.
Mike1967
Contributor
GF99/99
Contributor
Yes as others have said Apeks uses AS568 -111 o -rings NOT a 112 which is what most other DIN connections use. If you use a 112 they will pop off all the time. This is a common mistake first time Apeks users make. I have around 10 apeks regs and never had an issue with any of them or o-rings coming off.
You can buy a bag of 100ea. of them from AS568-111 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring [B70111] : The O-Ring Store LLC, We make getting O-Rings easy! for $1.90 its really not that big of a deal that they are different from others. For a whole $2 you can get a lifetime supply of them. And if your really worried about it you could order 1,000ea. of them and then you get a discount drops the price down to $13 for 1,000
You can buy a bag of 100ea. of them from AS568-111 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring [B70111] : The O-Ring Store LLC, We make getting O-Rings easy! for $1.90 its really not that big of a deal that they are different from others. For a whole $2 you can get a lifetime supply of them. And if your really worried about it you could order 1,000ea. of them and then you get a discount drops the price down to $13 for 1,000
Mike1967
Contributor
The stock out of the box orings on all 4 of our apeks regs that were installed by apeks in manufacturing continually blew out.
Just tried new MTX-RC maybe that is valid option for you. Comes standard with 5th port and turret is better than DST. Also you can but it as Double tek set, so you get hoses and pressure meter all in same set.
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