Scubapro G250 freshly serviced but messing up!!!!

[HamTrainChickenLaser]

Sounds like the hose was not tightened when attached to the 2nd stage. Did the shop that serviced your reg also install that hose?

Inside that hose fitting there’s a spindle with an o-ring around it. When the hose was loose while pressurized, it probably extruded the o-ring and ruined it. It happens frequently if people don’t tighten the hose. I kind of assume that someone other than the person who serviced the regulator installed that hose, someone who does not have the scubapro tool for holding that knurled stop nut while tightening the hose, and did not want to over tighten, stressing the plastic case around the knurled nut.

That knurled nut, BTW, is a general PITA for this exact reason. It only really works if you use a SP hose that has the same type of fitting, then you use two of those SP-specific wrenches to install the hose and you can then slip the wrenches off. Otherwise you do what Nemrod mentioned, just use a pair of channel locks or pliers with some tape on the jaws to prevent marring the stupid nut that shouldn’t be there in the first place.

While I’m in a somewhat ornery mood about the SP specific nut, I might as well rant a little and say that using a braided 7 foot hose for recreational diving is not what I would call a good choice. The braided hoses don’t work well IMO for the long hose, they tend to be unruly and floaty, and using a 7ft hose for single tank recreational diving is not necessary and not streamlined. I’ll go out on a limb and guess that some tech diver who uses a 7ft hose told you to use one. It’s great for technical diving, but a 5 ft hose or even 40” under-the-arm-with elbow is every bit as good for air sharing in OW and much easier to manage for a new diver like yourself.

The set that I am diving is exactly as I handed it to the Scubapro dealer when I took it in to have it serviced. If indeed he just didn't tighten the braided long hose to the G250 then that's concerning.

I didn't use any one opinion when I decided on this configuration. I read voraciously- books, blog posts, and of course here on Scubaboard. I listen to diving podcasts. I seek out information anywhere I can find it. I'm definitely interested in technical diving as well as wreck penetration, so the setup seemed sensible to start with. I can't find any drawback to it at this point. It's definitely streamlined on me as it fits snugly to my body when it is tucked. Maybe someone who is short and thin would find that it gaps here and there? I was 6' in my youth but now I'm probably 5'11" and I weigh 240 lbs so it works for me.

I guess I've never noticed the floatiness but not sure why. I've done air-sharing exercises with it and it has seemed to work tucked and untucked but as is often said "you don't know what you don't know" so until I have a long hose in rubber as well I won't know the difference.

Also yes, Scubapro needs to calm down with their proprietary nuts.

 

[HamTrainChickenLaser]

While I am here- are those Scubapro brand zip ties that my dealer used on my mouthpieces? Because they are not high-quality. Twice after diving I've noticed the mouthpiece coming off and had to push it back in place.

No, three times. Noticed it again taking these pics:

With normal black UV resistant zip ties you can put a lot of force on them when tightening and I doubt this would keep happening.

 

[Mobulai]

Also yes, Scubapro needs to calm down with their proprietary nuts.

Oh do I have a thread for you where this escalated into a whole movement of making custom nuts

I feel you, but I got a splined nut tool and take it always with me

 

[HamTrainChickenLaser]

Oh do I have a thread for you where this escalated into a whole movement of making custom nuts

I feel you, but I got a splined nut tool and take it always with me

It could be said that Scuba folks need to calm down as well!!!!

Yeah I've definitely added some "tools to acquire" to my list after this trip.

 

[Still Kicking]

The set that I am diving is exactly as I handed it to the Scubapro dealer when I took it in to have it serviced. If indeed he just didn't tighten the braided long hose to the G250 then that's concerning.

I didn't use any one opinion when I decided on this configuration. I read voraciously- books, blog posts, and of course here on Scubaboard. I listen to diving podcasts. I seek out information anywhere I can find it. I'm definitely interested in technical diving as well as wreck penetration, so the setup seemed sensible to start with. I can't find any drawback to it at this point. It's definitely streamlined on me as it fits snugly to my body when it is tucked. Maybe someone who is short and thin would find that it gaps here and there? I was 6' in my youth but now I'm probably 5'11" and I weigh 240 lbs so it works for me.

I guess I've never noticed the floatiness but not sure why. I've done air-sharing exercises with it and it has seemed to work tucked and untucked but as is often said "you don't know what you don't know" so until I have a long hose in rubber as well I won't know the difference.

Also yes, Scubapro needs to calm down with their proprietary nuts.

This is the downside to learning stuff online. A lot of the info out there is contextual and sometimes contradictory. If you don't understand the context it's easy to go down the wrong rabbit hole and end up with a configuration that makes no sense. If you are going to embark on a technical path you need to find a solid tech mentor who can give you the full understanding of why things are done the way they are. And don't buy gear on the basis of "because I expect to get into that in the future." Use gear that makes sense for what you are doing now.

 

[rhwestfall]

Use gear that makes sense for what you are doing now.

+1

 

[johndiver999]

While I am here- are those Scubapro brand zip ties that my dealer used on my mouthpieces? Because they are not high-quality. Twice after diving I've noticed the mouthpiece coming off and had to push it back in place.

No, three times. Noticed it again taking these pics:

View attachment 910705
View attachment 910706



With normal black UV resistant zip ties you can put a lot of force on them when tightening and I doubt this would keep happening.

I've never had trouble with those particular type of zip ties, but a loose mouthpiece that could potentially leak, or worse, fall off is a MAJOR concern - especially falling off.

You want to test the mouthpiece connection frequently, probably before diving each day. Instead of pulling on the mouthpiece forcefully, which might damage it, I just try to somewhat gently TWIST it. If it rotates several degrees, pretty easily, then it is too loose and should be addressed. You can pull on the mouth piece gently to check for tears or rips, but I would not want to do that to check for security. A gentle twist should not tear or damage the mouthpiece.

In a pinch, you can remove the zip tie. Use some reel line and tie a decent constrictor knot and maybe a square knot after that and burn the ends with a lighter, but most places should have a zip tie, if you don't have spares.

 

[davehicks]

It could be said that Scuba folks need to calm down as well!!!!

Yeah I've definitely added some "tools to acquire" to my list after this trip.

A printed Spline nut wrench i made:

ScubaPro Spline Wrench - Open and closed ends Remixed by awkward_swine MakerWorld: Download Free 3D Models

Boost MeHelp support my 3D Printing habit with a Boost! It's greatly appreciated. Several ScubaPro 2nd stage regulators include a “spline nut” on the regulator body. The spine design is supposed to with temperature regulation, but it also makes it difficult to remove or replace without...

makerworld.com

 

[Mobulai]

are those Scubapro brand zip ties that my dealer used on my mouthpieces? Because they are not high-quality. Twice after diving I've noticed the mouthpiece coming off and had to push it back in place.

This one you have is called “Simple blister”, SP have another variant called “blister” (simply no simple , not simple at all )
The “blister” (attached) is very strong and effective at its job — I didn’t have bad experience with the “simple” but I never trusted them, tried it at home and reverted back to the blister

 

[halocline]

While I am here- are those Scubapro brand zip ties that my dealer used on my mouthpieces? Because they are not high-quality. Twice after diving I've noticed the mouthpiece coming off and had to push it back in place.

No, three times. Noticed it again taking these pics:

View attachment 910705

View attachment 910706

View attachment 910707

With normal black UV resistant zip ties you can put a lot of force on them when tightening and I doubt this would keep happening.

Just use a regular zip tie and your problem will disappear. Replacing a zip tie at rebuild time is hardly a crushing expense.