Scubapro G250 freshly serviced but messing up!!!!

[rhwestfall]

It's a g250, so an "ancient" reg, (didn't even say g250v, so 1980's/90's?). That could date the hose as older too, so o-ring could easily be crusty...

Older rubber hoses seem to go on forever..

 

[Nemrod]

It's a g250, so an "ancient" reg, (didn't even say g250v, so 1980's/90's?). That could date the hose as older too, so o-ring could easily be crusty...

Older rubber hoses seem to go on forever..

The G250 in the picture has a plastic knob so is probably early 90s. The hose is not Scubapro, it is a braided hose with a standard hex nut rather than the goofy Scubapro splined nut requiring a special tool (or duct tape wrapped pliers ). The hose being braided it probably is not very old. If a hose nut comes loose, whch can easily happen after service, it will most likely begin to leak just before it pops off completely.

I bought a brand new G260 set, got a discount from my LDS for services rendered. I pressurized the set on the pool deck and the second stage shot across the deck, kapop! Yep, the hose was barely threaded on. Hey, do y'all have some wrenches please? No harm, no foul. It leaked really a whole lot after that second stage parted company with the hose! I bought it just after shoulder surgery and what I think happoenedd is the hose nut was not tight and when I coiled it up to put in the bag the nut became backed off from the rotating motion of coiling the hose. Then, weeks later when my shoulder was good enough to play in the scuba center pool, kapop! I had not noticed it having come loose and backed off, dummy <---- me.

And just to say, the plain, good ol' G250 is the greatest regulator second stage of all time, bar none .

From the late and great @Angelo Farina:

 

[HamTrainChickenLaser]

OK, yes- it was the hose o-ring. And also yes, I did have all of the hoses with the set when I took it in for service. Gabby said that o-ring failures can be unpredictable and this is not an indication that the service person did anything wrong.

And correct- the hose on this is a 7' Miflex.

 

[Nemrod]

That is a nice looking G250. Glad you are fixed up and back to diving . No more messing up allowed for this trip .

 

[HamTrainChickenLaser]

That is a nice looking G250. Glad you are fixed up and back to diving . No more messing up allowed for this trip .

I hope you are correct!!! I like how the G250 breathes!

 

[rhwestfall]

Yet I'm sure Nemrod still thinks we are all wrong diagnosing/resolving the issue...

 

[Still Kicking]

Did they overhaul you system or just do an inspection? IMO hose orings should be changed during an overhaul.

 

[madamimadam]

I hope you are correct!!! I like how the G250 breathes!

I like how you correctly spell "breathes"!

 

[Nemrod]

Yet I'm sure Nemrod still thinks we are all wrong diagnosing/resolving the issue...

Not sure what that means. I have already acknowledged that they found a torn O-ring and was hopeful the OP was back in business and good to go and happy that he is.

Look, not being mean here, if you are not interested in reading my posts or dislike them or me or find them unhelpful, there is the ignore button and that goes for anyone on here. Were you looking for a high five, a butt slap for a score, some sort of congrats, what? Okay, you were correct and my thought that it was just a loose hose was in error. I usuallly start with the simplest possibilities first and progress from there.

 

[halocline]

I noticed after the previous dive that the knurled scubapro-specific nut was loosening from the nut beside it, and was leaking air. Well I screwed them back together hand-tight and thought it was all good, jumped in the water for the next dive and lots of bubbles. Sometimes it depends on how much pressure on the hose from different angles whether it's a tiny leak or a big one.

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.