MK2 first stages and cold water

mbelair · 19th October 2006, 22:36

I'm in the last stages of choosing how to order my Meg.

I'm hesitating in the choice of regulators. The Meg comes standard, for now with Scubapro MK2 first stages, I am hesitant as to their response in cold water.

I know that they will not be very solicited but in our neighbourhood, winter diving involves temps of close to 0 C in the St-Lawrence river in it's fresh water part and sometimes sub zero temps for the salt water area. The risk of freeze ups and free-flows does worry me a bit.

Anyone with experience in these conditions would care to comment?

akscubainst · 19th October 2006, 23:14

I've never had a problem with a MK2 on O/C here in Alaska. Water temps get down to 34'F I would guess that's about 1 deg C.
For O/C they wouldn't be my first choice but, I have several in my rentals and have never gotten any complaints about them.

Dave

jmark18 · 20th October 2006, 00:06

I've used one for my argon rig for 10 years and no problems but I use the environmental cap with silicone in it.

Explorer · 20th October 2006, 05:17

Marc,

I started a post some time ago wrt a first stage for my Meg. http://www.rebreatherworld.com/megal...ds-4-megs.html

I have had no problems with the Mk II + that came with my Meg and also use the same first stage for my argon bottles.

The Mk II+ is a workhorse reg for sure. The amount of gas required when using your Meg is pss. That's it. Very little flow through your first stage when using CCR. For OC, that's a different story because your first stage is working, working, working for every breathe you take.

There, my 2 cents worth, eh.

Jeff

mbelair · 20th October 2006, 11:40

Quote: (Originally Posted by Explorer)

Marc,

I started a post some time ago wrt a first stage for my Meg. http://www.rebreatherworld.com/megal...ds-4-megs.html

Thanks for the link, interesting.

Quote:

I have had no problems with the Mk II + that came with my Meg and also use the same first stage for my argon bottles.
Jeff

How deep and how cold have you tested it in both fresh and salt water?

jmark18 · 20th October 2006, 17:05

Quote: (Originally Posted by mbelair)

Thanks for the link, interesting.

How deep and how cold have you tested it in both fresh and salt water?

Fresh water only to 300 ft.

***Decodiver*** · 20th October 2006, 21:35

Mine have been taken on the Meg to -105 metres in Lake Leman (Geneva) Switzerland, no problems.

Cheers,

Dave cooper.

19th October 2006, 22:36	#1 (permalink)
mbelair New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Jan 2006 Location: Montreal Posts: 82	MK2 first stages and cold water I'm in the last stages of choosing how to order my Meg. I'm hesitating in the choice of regulators. The Meg comes standard, for now with Scubapro MK2 first stages, I am hesitant as to their response in cold water. I know that they will not be very solicited but in our neighbourhood, winter diving involves temps of close to 0 C in the St-Lawrence river in it's fresh water part and sometimes sub zero temps for the salt water area. The risk of freeze ups and free-flows does worry me a bit. Anyone with experience in these conditions would care to comment? __________________ Marc
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19th October 2006, 23:14	#2 (permalink)
akscubainst It's cold here! Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: May 2005 Location: Juneau, Alaska Posts: 65	Re: MK2 first stages and cold water I've never had a problem with a MK2 on O/C here in Alaska. Water temps get down to 34'F I would guess that's about 1 deg C. For O/C they wouldn't be my first choice but, I have several in my rentals and have never gotten any complaints about them. Dave
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20th October 2006, 00:06	#3 (permalink)
jmark18 New Member Current Rebreather/s: Sport Kiss Other Rebreather/s: Join Date: Mar 2005 Location: DundasOntario,Canada Posts: 30	Re: MK2 first stages and cold water I've used one for my argon rig for 10 years and no problems but I use the environmental cap with silicone in it.
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20th October 2006, 05:17	#4 (permalink)
Explorer I will teach you a..... Current Rebreather/s: Evolution Megalodon Other Rebreather/s: Join Date: Sep 2005 Location: Alberta, Canada Posts: 773	Re: MK2 first stages and cold water Marc, I started a post some time ago wrt a first stage for my Meg. http://www.rebreatherworld.com/megal...ds-4-megs.html I have had no problems with the Mk II + that came with my Meg and also use the same first stage for my argon bottles. The Mk II+ is a workhorse reg for sure. The amount of gas required when using your Meg is pss. That's it. Very little flow through your first stage when using CCR. For OC, that's a different story because your first stage is working, working, working for every breathe you take. There, my 2 cents worth, eh. Jeff __________________ 20 dwarves, 20 dwarves, 20 dwarves took turns doing handstands on the carpet
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20th October 2006, 11:40	#5 (permalink)
mbelair New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Jan 2006 Location: Montreal Posts: 82	Re: MK2 first stages and cold water Quote: (Originally Posted by Explorer) Marc, I started a post some time ago wrt a first stage for my Meg. http://www.rebreatherworld.com/megal...ds-4-megs.html Thanks for the link, interesting. Quote: I have had no problems with the Mk II + that came with my Meg and also use the same first stage for my argon bottles. Jeff How deep and how cold have you tested it in both fresh and salt water? __________________ Marc
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20th October 2006, 17:05	#6 (permalink)
jmark18 New Member Current Rebreather/s: Sport Kiss Other Rebreather/s: Join Date: Mar 2005 Location: DundasOntario,Canada Posts: 30	Re: MK2 first stages and cold water Quote: (Originally Posted by mbelair) Thanks for the link, interesting. How deep and how cold have you tested it in both fresh and salt water? Fresh water only to 300 ft.
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20th October 2006, 21:35	#7 (permalink)
*Decodiver* Administrator Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Jan 2005 Location: Geneva Posts: 2,181	Re: MK2 first stages and cold water Mine have been taken on the Meg to -105 metres in Lake Leman (Geneva) Switzerland, no problems. Cheers, Dave cooper. __________________ CCR/OC Trimix Instructor Trainer CCR Training to Mixed Gas in Switzerland, France, UK & Germany on Megalodon/COPIS-Megalodon/KISS/Sport KISS/Ouroboros/rEvo/Inspiration/Evolution/Sentinel www.zerogravitydiving.com Rebreather World Terms & Conditions
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