Why no redundancy in mainstream rec scuba?

[chrisch]

Sometimes it has nothing to do with servicing. I never had a freeflow myself during a dive with 1 of my regs which are never serviced,

I think we are at linguistic cross purposes. My regs don't free flow either and rarely see a service.

Never serviced means here they are checked regularly by myself,

Agreed - I do the same.

But I had after letting servicing the Titan by an official technician several freeflows

That was my comment - it is bad service that causes free flows - the post from someone living in a very cold place would (hopefully) mean the service people in that area service with cold water in mind.
There is plenty of anecdotal evidence that the majority of problems with regulators occurs after they have been serviced. Too many divers accept bad services and poor quality servicing and so too many bad and mediocre technicians exist.

. Every time I went back to the shop and when I thought it is now ok(a week no problems), I got a freeflow after coming from 110m/360ft depth when I switched to the EAN50. All no problem, close valve, open it to breath, close it again. But after 5-6 breaths, there was no gas coming anymore. A full cylinder, 25 dives after servicing, several freeflows before this dive, but the last 10-15 dives no freeflows anymore. We finished the dive with no other issues and problems, no stress has been there, but I went to another shop to let them look at my regulator which had worked flawlessy without servicing for about 450 dives and gave problems after servicing. They found that there was a part wrong assembled.

This is the key point. Thanks for posting that. I think we are in agreement.

 

[Neilwood]

I think we are at linguistic cross purposes. My regs don't free flow either and rarely see a service.

Agreed - I do the same.

That was my comment - it is bad service that causes free flows - the post from someone living in a very cold place would (hopefully) mean the service people in that area service with cold water in mind.
There is plenty of anecdotal evidence that the majority of problems with regulators occurs after they have been serviced. Too many divers accept bad services and poor quality servicing and so too many bad and mediocre technicians exist.

This is the key point. Thanks for posting that. I think we are in agreement.

I think the issue with the servicing is that most service techs appear to think that people want the reg to be tuned so finely that it actually leaves them very close to freeflowing. Detuning a shade from that point would stop a lot of the issues.

 

[shurite7]

My OW training was quite a while ago and although teaching buddy diving was an intergral part of my training, I have no first hand knowledge of what the NAUI standard. Since PADI belongs to RSTC, planning and conducting a dive with a buddy is explicitly stated in the RSTC standards they follow.Bob

On page 9 of the 2017 NAUI Standards and Procedures in the NAUI credo section it states "We believe in the traditional concept of the buddy system for scuba diving." Throughout the S&P it states divers are to effectively dive as a buddy team; I'm not going to give page numbers for every time buddy is brought up.

Now you have it from an official NAUI document. The RSTC has absolutely nothing to do with NAUI's policy. After all, there are more agencies that are not part of RSTC than there are those who are.

 

[Bob DBF]

On page 9 of the 2017 NAUI Standards and Procedures in the NAUI credo section it states "We believe in the traditional concept of the buddy system for scuba diving." Throughout the S&P it states divers are to effectively dive as a buddy team; I'm not going to give page numbers for every time buddy is brought up. .

Thanks, what I didn't have was NAUI standards or a citation. A lot of bs is written in posts and I didn't want to add to it by making up a quote.

Now you have it from an official NAUI document. The RSTC has absolutely nothing to do with NAUI's policy. After all, there are more agencies that are not part of RSTC than there are those who are.

That is why I had to exclude NAUI when quoting the RSTC. As for more agencies not a part of the RSTC, I have no way of knowing if that is a good or bad thing.


Bob

 

[MXGratefulDiver]

... I mentioned that same point a couple days ago ...

NAUI Credo

... Bob (Grateful Diver)

 

[HeliMech]

He said it wasn't appropriate, not impossible. I use halves, less my ascent pressure which is 10psi/ft, with 600 being the absolute minimum. If I'm diving a 3500 psi tank, and the deepest will be 80ft, my ascent pressure will be 800psi. 3500-[(3500-800)/2]=2150 psi is my "turn pressure". If I'm doing a 40ft dive, 3500-[(3500-600)/2]=2550psi.

Thanks for the comment. I'll refamiliarize myself before I wade into water tomorrow morning.