MK25-Which end is up?

[Paco II]

This thread is actually quite useful for many types of regs. I recently bought an Atomic reg and the shop had routed the hoses so that it was swivel down. I thought they did it wrong I much prefer swivel down, especially with the kelp diving we do here in N. Cal.

 

[Bob]

View attachment 40233

OK.. Is it or isn't it a MK25?

And yes, I can read the knob!!:no

Yes, you have a MK 25. almtree: Bob

 

[Packhorse]

Really?
It looks much more like My MK20s than it does my MK25s.
In the end I doubt it makes any diffrence.

 

[amajamar]

Thanks, Bob.

 

[mtbrider]

The new MK25s have an "AF" suffix which means "anti-freeze" which adds fins to the lower part of the regulator, among other things. So you probably have a MK25 without the "anti-freeze" goodies. To see if it truly has the MK25 features, which would be an adjustable IP, you should look in the top of the regulator where the plastic cap is, and see if there is a hex key adjustment in the center.

 

[amajamar]

Yes, there is an alan wrench hole in the end.

At what water temp do you need the AF fins?

 

[mtbrider]

Hmm, it's hard to say. If I had to guess I would say anything above 40 F would be fine without the "AF" stuff. Of course it depends on how you use the regs too.

 

[tedj01]

It looks like my born-again Mk25; existed as a MK20/EAN in its previous life. It had a conversion inflicted on it by myself. Also. appears to look like wife's MK25.

 

[mobeeno]

I much prefer swivel down, especially with the kelp diving we do here in N. Cal.

Another good reason for having the swivel down.

 

[evil_xander]

I agree. Using a standard length hose, using the center port would make the hose too short to be comfortable.

Yes, I know as I tried.

Now, with the long hose, center turret port makes perfect sense:
http://www.inet.hr/~astancin/dss/yvalve2.jpg

Btw, that looks like an early model of Mk25, now they have these fins before the turret part (zoom in the picture to see the difference):
http://www.inet.hr/~astancin/dss/dss_side2.jpg