Purge Valve Retaining Ring for Aqua Lung Titan LX

So let me begin by stating I do not scuba dive. In fact, I don't know how to swim and I am scared of water. Don't ask. Anyway, a fellow reached out and asked if I could model something that no one creates anymore but needs an aftermarket replacement part. I love 3D printing for such a utility, so I said sure, I'll try! He sent me this part to an Aqua Lung Titan LX regulator. He needed the yellow retaining ring that holds the purge valve cover in place, printed. (Note, yes, the purge valve cover itself is also printed out of TPU, but I did not make this and I don't know who does. Now that I think of it, I should have made a model of that as well to give you guys but I already sent it back). This screws in just like the regular part

Now for the warning aspects: I made this in petg-cf. I do not know how this will perform while scuba. I did a few hours of research before even printing it, and there were many debates spanning a few years on whether scuba people would use PETG for scuba or not. I would say it was about 50/50 on “No, do not use petg” vs “I have a printed petg part and it's lasted me 5 years”

So, with that said, treat this as a consumable item that will fail. Do not rely on it. I don't know anything about scuba and I don't know if this failing would be life-changing for you or not, so pretend it is and use due diligence!