LP hose deterioration

[decompression]

New findings with LP hose deterioration from DAN...
Divers Alert Network South Africa - Newsflash! Low Pressure Hose Deterioration

 

[redacted]

Who, other than Myflex, manufactures these hoses?

 

[decompression]

I can think of several different manufactures, but it also mentions rubber hoses as well. I recall Andy (Devondiver) having this exact issue not too long ago.

 

[halocline]

Has there been a documented, proven case of this happening with rubber hoses? I don't think so. They've been around for decades and this degradation appears to be a new problem. I think the inclusion of rubber hoses in that article is misleading; it just says that all hoses have a limited service life. It doesn't say anything about rubber hoses crystallizing and blocking. It's the braided hoses that are at issue here.

I have rubber hoses that are definitely decades old and work perfectly. I have never, not once, observed any sort of internal crystallization or flaking with a traditional rubber regulator hose.

 

[cool_hardware52]

I suspect the liners in the Myflex or myflex style hoses are polyurethane. Decomposition of PU will be quite different than thermo setting rubbers.

Tobin

 

[WarrenZ]

I saw a rubber hose fail gracefully after about 16 years it started gently fizzing on a dive. Another was a cut with resulting air escapage not on a dive. But I have never been party to a rubber hose failing by internal degradation.