Need help identifying this 1st Stage.

[SeekerOfJustice]

I have used this reg and 1st stage for some time now. I picked it up used from a LDS at a very good price. I Have to say it has been the most comfortable stage 2 I Have used and a great performer. I know the second stage is a Delta 1 but I can't figure out what the 1st stage is aside from being called a balanced piston.

Anyone know? Searched to no avail. I have only found these for sale under "Balanced Piston".

 

[Fishpie]

I think they only make one balanced piston.....try PX2.

 

[SeekerOfJustice]

That was fast! I had considered the PX2 but all the images I find for that model are this one:

 

[Jim Lapenta]

In the service manual the body boot (black rubber thingie) is to be tossed if it was deformed. Now you may have one that the boot was removed or an earlier model that was made before they put the boots on. I'm leaning towards the latter since I don't see a groove in the metal that is referred to in the manual that holds the boot on. It is a good reliable reg. Like some other regs of it's type you adjust the intermediate pressure by adding or removing plastic shims inside the body. Sherwood does this on their Brut regs. If tuned correctly it will breath as good as any at recreational depths.

 

[SeekerOfJustice]

Thanks for both of you! Great information. Now I know what this is finally. Odd about the boot. Had no idea I was looking at the same reg. Thanks again.

 

[NCadiver]

I believe that's what oceanic refer to as a "pre-95 balance piston" predecessor to the PX2 and that look like a delta 2 second stage.