regulators that work in warm AND cold water?

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Mares Abyss, ScubaPro and Poseidon are all good in cold water.

I own and have used Mares Abyss and ScubaPro regs diving off the coast of Scotland
 
I have limited cold water (< 40oF) but I think it might fair to explain what actually causes icing on a reg. As air expands out of tank the and then from the LP hose to the reg, it cools the surrounding metal and can push it below the freezing point. Any time you are in cold water and open a valve to release pressure, you run the risk of collecting ice on the component. Importantly, if you are concerned about ice on a regulator, you should also keep in mind that your BCD/ drysuits LP pressure ports can ice up just as easily in very cold water and should also be considered a potential problem if you are planning on doing real cold water diving.

Realistically, unless you are planning on going dry, you probably won't be doing much diving in conditions where icing up regs will be an issue.

Before any one gets on my case about "yes you can dive wet in cold water," I been in 36oF water in a wetsuit, but it is not habit forming.....
 
Being a good cold-water reg is the challenge. Any good cold-water reg will do fine in warm temps. Our dive season is 4-6 months of ice diving. Overwhelmingly popular are Apex regs, also a lot of Poseidons (great regs but popularity suffers because servicing is SIGNIFICANTLY more expensive -at least around here) . Some others too but these two brands are about 80% of what you see people taking under the ice.

A huge difference will be in how you take care of your regs. Remember to keep up your end of the deal!
 
The sealed diaphragm Mark 17 first stage is not only 'supposedly' better in 35F degree water, it is at least as good as any of the regulators that are mentioned repeatedly... I would never voluntarily get into water that cold (35F!!) using either because I would never get in to water that cold

So your heartfelt endorsement is based on what, hearsay?
 
Get one that is ok for cold water (& sealed), it will also work in warm water
 
So your heartfelt endorsement is based on what, hearsay?

Other people's experiences, a fair amount of understanding regarding the mechanical structure and differences among various regulators gained from working on them, especially the two I mentioned, an overarching observation that marginally maintained equipment tends to have more problems than well maintained equipment does, especially when small issues, things that can be exacerbated by a touch of roughness and grit where clean smoothness might avoid a problem, and the observation that nothing is problem-free leads to the overall conclusion that high quality diaphragm environmentally sealed 1st stages are all extremely reliable, and seldom fail, though anything may have problems under really extreme circumstances, especially things not maintained in superb order, or equipment being employed in circumstances where the implacable Physics of gasses under pressure may have one dancing on a knife's edge.

The only cold water failures I've seen were freeflows. I know a guy whose buddy disassembled his G250 in a cave to free up a frozen something or other (I was not there). Easy to do with a 250 (except the V). Just watch out for parts floating away.

My comment of approximate equivalency is certainly not "heartfelt endorsement". My one enviro sealed diaphragm 1st stage is a Zeagle. Excessive attachment to and championing of any brand is symptomatic of a lack of understanding, honesty, or experience

So yes, hearsay and divine revelation.
 
Realistically, unless you are planning on going dry, you probably won't be doing much diving in conditions where icing up regs will be an issue.

Before any one gets on my case about "yes you can dive wet in cold water," I been in 36oF water in a wetsuit, but it is not habit forming.....

Not getting on your case at all but when it's 90 degrees out and you're in a good 7mm wetsuit, it actually feels really nice hitting that cold water sometimes. Ironically there are some dive tables around 70ft and I've found it REALLY relaxing to sit lay down on the table just to feel one part of the thermocline on top and the colder on the bottom. A LOT of people think you are nuts to enjoy diving wet (in that environment) even around here but some really like it. I normally dive using only reef gloves in these conditions.
 
If you're really going to dive in 40F or colder water, get an environmentally sealed 1st stage, and maybe even a 2nd stage with lots of metal for good heat transfer. But there's more to diving in water that cold than simply buying a sealed regulator. Unless you have a drysuit, chances are you won't be diving in freezing cold water much. You might try it, but unless you're a freak of nature, you'll get pretty cold really fast.

Then there's cold water reg-handling technique to limit the effects of the adiabatic cooling; don't breathe off your reg on the surface if it's really cold, be very careful of initiating free-flows in the water, try not to inflate the drysuit, BC, and breathe at the same time, stuff like that.

I've been in fairly cold water (maybe low 50s) exactly once for about 10 minutes before I started turning blue and went up above the thermocline. So I'm hardly an expert on cold water, but it is a very common topic and there's a good body of common knowledge out there.

---------- Post added June 26th, 2013 at 11:59 AM ----------

Not getting on your case at all but when it's 90 degrees out and you're in a good 7mm wetsuit, it actually feels really nice hitting that cold water sometimes.

Sure, it feels great, for a few minutes maybe, then, brrrrrrrrrrrrrrrrr.;)
 
The sealed diaphragm Mark 17 first stage is not only 'supposedly' better in 35F degree water, it is at least as good as any of the regulators that are mentioned repeatedly. Apex are fine, I'm sure. So are Mk 17s. I would never voluntarily get into water that cold (35F!!) using either because I would never get in to water that cold.
Yes I mentioned that the M17 was a decent cold water regulator as that is what I've heard. I can tell you from personal experience the M25 is nothing most people would choose to dive without the cold water kit which I have heard exists. My MK25 free-flowed (not on my 1st 100 ft dive but my second deeper dive which was 75ft) after two dives and not on the same day. The shop tried to adjust it but it's not something I would trust my gas to in a deeper COLD environment. There is a reason that they only sell Scubapro in one shop that I know of. That shop is in WI. I know of none that sell Scubapro in MN. I'm sure you could find a store but there is no love for Scubapro around here as MOST of their regulator line is not meant for REAL cold temperatures. They sell good cold water regulators in locations where you need them. The lack of Scubapro regs on the market around here speaks for itself. Sure there are places that will order them for you if they are a Scubapro dealer but I know of no experienced diver around here that doesn't laugh at Scubapro regs. Just the other day I purchased a 40CF tank for a pony and told them I was going to use a Scubapro regulator. They laughed until I told them I still had one laying around and would likely change it when I could afford to. Ended up with a Dive-rite regulator. Granted I have no experience with other regulators than APEKS and the ones I have mentioned, the TRUST I have in my APEKS has been earned.

If you want a Scubapro MK25 with a S555 2nd, R295 Octo (has like three dives on the octo), and a counsel with a compass, SPG, and Uwatec Aladin Prime computer I'll sell if all for $325 shipped. Probably a good deal for someone that only dives warm water but I would never recommend it to anyone who dives COLD water. It's just been gathering dust for the past year. As always I would recommend getting it serviced before use. Actually almost paid off my last trip. I guess this rig might find some love in the regulator classifieds. I've got $150+ just in the octo.
 
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Yes I mentioned that the M17 was a decent cold water regulator as that is what I've heard. I can tell you from personal experience the M25 is nothing most people would choose to dive without the cold water kit which I have heard exists. My MK25 free-flowed (not on my 1st 100 ft dive but my second deeper dive which was 75ft) after two dives and not on the same day. The shop tried to adjust it but it's not something I would trust my gas to in a deeper COLD environment. There is a reason that they only sell Scubapro in one shop that I know of. That shop is in WI. I know of none that sell Scubapro in MN. I'm sure you could find a store but there is no love for Scubapro around here as MOST of their regulator line is not meant for REAL cold temperatures. They sell good cold water regulators in locations where you need them. The lack of Scubapro regs on the market around here speaks for itself. Sure there are places that will order them for you if they are a Scubapro dealer but I know of no experienced diver around here that doesn't laugh at Scubapro regs. Just the other day I purchased a 40CF tank for a pony and told them I was going to use a Scubapro regulator. They laughed until I told them I still had one laying around and would likely change it when I could afford to. Ended up with a Dive-rite regulator. Granted I have no experience with other regulators than APEKS and the ones I have mentioned, the TRUST I have in my APEKS has been earned.

If you want a Scubapro MK25 with a S555 2nd, R295 Octo (has like three dives on the octo), and a counsel with a compass, SPG, and Uwatec Aladin Prime computer I'll sell if all for $225 shipped. Probably a good deal for someone that only dives warm water but I would never recommend it to anyone who dives COLD water. It's just been gathering dust for the past year. As always I would recommend getting it serviced before use. Actually almost paid off my last trip. I guess this rig might find some love in the regulator classifieds. I've got $150+ just in the octo.

Laughter is a good thing for the soul. It's good that there are things that bring such merriment to the frozen north country.

I would never recommend using a Mk 25 in icy water because it's a piston regulator. People use them for such things, and run the inherent risks, including having some dour serious fellows break out into laughter louder than that which John Wayne caused when he walked into an old west tavern and ordered a glass of milk. The thought makes my blood run cold.

I have no idea what Scubapro's marketing strategies are, regional or technical. I'm very familiar with some of their regulators, many of which are variations on the same theme, something not unknown among other manufacturers. I am not a huge SP fan, largely because of their restrictions on selling parts, their high handed abuse of the old Scubapro on-line museum, its second rate replacement, and a few other issues, but most of my regs are vintage Scubapro, an entrancing array of Mk 5s, Mk10s, G250s, 109/156s/ even a d300. Beautiful things.

No computers, though. No instruments, no wet suits, etc. I do have a green Scubapro emergency whistle on a thick cord that dates back to a time when there were only 8 or 9 elements on the Periodic Chart. Loud as heck. I have a new condition gigantic heavy chrome plated flat ended knife almost like a crowbar that goes back to SPs early origins on the West Coast. The guy I bought it from said it was used for prying big seafood shell things off rocks. "Abalone?" I guessed, and he immediately got mad at me, blond mustache bristling, said I was making fun of him, doubting his honesty. I think he may have been from the little cluster of states that are adjacent to the Great Lakes, places where they scowl a lot and play the 'Wreck of the Edmund Fitzgerald' over and over, looking sad until some effete fool walks in and mentions Scubapro, bringing some much needed hilarity to their poor leaden souls. I quickly bought the knife.
 

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