Scubapro Regulator ID?

[CoasterFreak]

Good evening all! Looking for some help from the gurus here...I picked up this regulator a few years back with some other gear, and cannot for the life of me find a matching pic online to tell what model it is. My best guess is it is a MK10, but again I can't find another image anywhere of an MK10 that looks just like this one. What do you think?

 

[runsongas]

mk5 spec

 

[CoasterFreak]

Thank you for your reply. What does the "spec" mean in your answer? Sorry to be dense

 

[runsongas]

It means it has the smaller holes in the ambient chamber so you can pack it with grease and environmentally seal the reg. Messy, but effective.

 

[Couv]

What does the "spec" mean

Silicone Protected Environmental Cap

Note that SP now recommends a PTFE grease and no longer uses or recommends the use of silicone; but IMHO silicone is still a very good way add protection to the ambient chamber in most piston first stages where O2 levels of 40% or less is used.

 

[Enraptured of the Deep]

@couv : One of my Mk5s has the S.P.E.C., just like the original poster's photo. Seeing the "Important Note" in the instructions page you posted makes me wonder: If I don't have/use the boot, do I need to pack the cap with silicone grease (or more modern substitute)? My coldest diving these days is above 65-degrees F.

 

[agilis]

@couv : One of my Mk5s has the S.P.E.C., just like the original poster's photo. Seeing the "Important Note" in the instructions page you posted makes me wonder: If I don't have/use the boot, do I need to pack the cap with silicone grease (or more modern substitute)? My coldest diving these days is above 65-degrees F.

No, absolutely not. I have a couple of Mk 5s (not spec) that I still use from time to time, including one that I've had since the 70s. No problems even in water in the upper 50s, which is as cold as I go at this stage of my life. My last time in Dominica I used a Mk 10 DIN with a D350 second stage. Breathes as well or better than anything on the boat.

 

[Couv]

If I don't have/use the boot, do I need to pack the cap with silicone grease (or more modern substitute)? My coldest diving these days is above 65-degrees F.

The MK5 never had a boot-so no worries there. As @agilis said above-no need to pack them either. The only issue, if you want to call it that, is the holes in the ambient chamber are small compared to a non-SPEC model so extra time and care is needed to flush out the chamber. Give it a good rinse after a day of diving, and a long soak (overnight if possible) at the end of a dive trip. Dry it well before storage.

 

[scott stanton]

Still diving that with a D300. No issues.