My hose exploded. Has anyone experienced this?

[Puffer Fish]

I've seen several do that... very scary, but usually not much more than that... never seen one underwater.. all the ones I saw were on the surface... yup... 1st stage malfuction will do that. Basically the 1st stage was not controlling the pressure to the line... and you will get a free flowing reg, and/or (depending on the rate of air being delivered)a loud noise. I would suspect someone put things together incorrectly.

 

[ScubaTexas]

I would strongly encourage you to have it looked at and overhauled by another reputable shop given the history of repeat escalating problems you encountered that seem to have gone undiagnoised and unresolved.

 

[JahJahwarrior]

Try Duct tape.

 

[Surelyshirly]

3 weeks ago I was buddied with a divemaster who was a guest diver with our club for some wreck diving in the Atlantic.

2nd dive of the day..... at 80 fsw about 10 minutes into the dive this is exactly what happened.

She said she had just recently had her regs serviced, she said it sounded like a gunshot to her, I heard the noise also, the amount of bubbles was tremendous, and I noted in my dive report how the size of some of the bubbles was spectacular.

On the surface, everyone was at the side of the boat waiting for us to surface, they saw the bubbles and immediately knew there was a problem and said we surfaced under a dome of bubbles they were so big.

The only thing left on her first stage was the stem, the hose blew completely off. Everyone said they had never seen that happen before

 

[redacted]

That has got to have been a defective hose, probably along with a loss of IP control. I can't think of anything even the most incompetent tech could do with downstream 2nds, short of glueing the LP seats to the orifices, that would cause such a failure. And the IP control failure alone will vent thru a 2nd stage without blowing an LP hose.

 

[Luis H]

I had my regulator set (2001 Dacor Viper Metal + Viper Octopus)

.

I am not familiar with those regulators. Are those pneumatically balanced second stages or just basic down stream demand valves?

I am wondering if some of the new pneumatically balanced second stages (if both the primary and octopus are balanced) should not be used with an over pressure relieve valve.


Oh... and I would also recommend a different dive shop, after they replace your hose.

The other moral of the story, when it comes to yearly service IMHO: "if it ain't broke don't fix it". Inspected...yes...check for corrosion, steady IP,...etc...etc. Learning how to service (or at least inspecting and testing IP) your own is also very helpful.
At least find someone you can really trust.

 

[cerich]

it isn't a balanced second
Sounds like the hp seat went and the hose
a hose will last years and years under normal use, however don't expect a 4 year old hose to hold up to many times over its rated pressure.
This is why shops that service should cycle regs when they service.\

 

[JahJahwarrior]

If working pressure is 400 psi, burst is 1200 psi, right? If that is correct, than you had 1200 psi running into your hose. 150 psi is a good IP, right? I am not sure if you could make the 1st send your 2nd 1200 psig! Therefore, either the hose is defective, the reg is defective or my assumption about working and burst pressure is completely off.

 

[Nemrod]

Yes, I have seen it happen and it is one of the reasons I service my own regulator, Luis adivce is good, if it isn't broke, leave it alone. Yearly tear down of regulaotrs is not needed. N

 

[cerich]

If working pressure is 400 psi, burst is 1200 psi, right? If that is correct, than you had 1200 psi running into your hose. 150 psi is a good IP, right? I am not sure if you could make the 1st send your 2nd 1200 psig! Therefore, either the hose is defective, the reg is defective or my assumption about working and burst pressure is completely off.

you make assumptions based on a new hose that is rated at 250 psi.

There is a great deal of harm done to a scuba hose by oxidization, use of ntrox speeds this up.

If your scuba tank is full at 3000 psi and your HP seat fails completly then it will attempt to send 3000 psi down that hose rated at 250psi. I expect the hose will fail such attempts with any back pressure at all from the second stage....