SP Mk2 O-ring sizes

[Jimmer]

Hey guys, quick question. I picked up a Mk2 for my argon bottle, it is leaking a small stream of bubbles out of the ambient pressure holes. What are the sizes of the 2 O-rings in this first stage?

Thanks,
Jim

 

[redacted]

That should be a -021 on the piston head and a -008 on the shaft.

 

[Jimmer]

Thanks Awap, always a help!

Jim

 

[AquaNSun]

If the -021 doesn't work, -022 might be a better fit as we saw a chart in the DIY section on O-rings.

 

[Jimmer]

Good call fellas. I checked the piston head o-ring once I got the damn thing apart (seized up threads pretty bad), and the 021 was a tad smaller than what I took out, so I popped in an 022, a 008 and all seems well on the argon reg front.

Thanks,
Jim

 

[redacted]

Yes, once again my sloppy notes have gotten me in trouble. It is a -022. Now if I can just make that change in all my notes or at least trash the incorrect ones.