G260 torn diaphargm

[Mobulai]

Hi guys,

Sorry for the late reply, i've been kinda offgrid.

Here is a google photos link with high resolution picture, with the 1st open too.

mk19 G260

11 new items added to shared album

photos.app.goo.gl

Dive Pacifica can indeed service it, i'll send it to them.
In the meantime i contacted the shop where i bought them, they asking for picture which i'm sending them. Now i'm waiting for their reply.

The mk19 environmental diaphragm and the exhaust diaphragm look good (from what I can see) — the plot thickens

 

[Tanks A Lot]

Thanks for sending those. I must admit I'm not much wiser than before. I have had one thought, which admittedly is a long-shot.

You mentioned that there were cockroaches in your hotel and from experience, places like these often use bug spray in the customers room when the rooms get cleaned.
As someone mentioned before, silicone is quite inert, however it does react with certain non-polar organic solvents. I know of some bug kill sprays that contain isoparaffin as the carrier solvent for the stuff that kills bugs. And isoparaffin is a non-polar organic solvent. As to how it would interact with a diaphragm, I honestly do not know, but is certainly something I will test when the opportunity arises. From my rude chemcial understanding silicone will react with it and indeed get brittle.

I do know that one of these bug sprays killed the straps on one of my backpacks, which was made from polyester. However it took many years on top of a shelf and probably spraying once a week for the straps to get brittle and break. This was not a one-time thing. This is also how I know that some contain isoparaffin.

The reason I mention this is also the way the diaphragms are damaged. The inner part, that sits underneath the purge button looks pristine. However, the middle part of the diaphragm, which sits underneath the slits of the cover is badly damaged. Just like something "fell" through the slits and settled

Maybe one of the second stages was lying face up in the room and the bug spray could go through the slits and settle on the diaphragm. The other second stage sat sideways and just just a bit of spray through one slit, hence only minor damage.

I know it's a bit out of place and there isn't much evidence, but one of the last things I was able to come up with, especially after you mentioned they didn't really go anywhere where they could have been exposed to adverse chemicals or engine exhausts.

 

[Mobulai]

The reason I mention this is also the way the diaphragms are damaged. The inner part, that sits underneath the purge button looks pristine. However, the middle part of the diaphragm, which sits underneath the slits of the cover is badly damaged. Just like something "fell" through the slits and settled

That was really bugging my brain as well

your theory would make a lot of sense given the exhaust was layered, and the 1st has a good shield by the cap

 

[Nemrod]

The silicone exhaust valve appears okay in the photos. Makes me think whatever destroyed the diaphragms was not from immersion. But came from outside. UV does not impact silicone in normal use but did these get left for weeks or months face up in the sun?

Did you dive in a nuclear reactor ?

 

[happy-diver]

People must only have seen mice at the movies where they are fourty feet long and chasing people
Me on the other hand, in my housing, also motor car electrical pursuits, have seen similar gnawings

and like cats, meeces can fit anywhere their head fits

 

[Nemrod]

People must only have seen mice at the movies where they are fourty feet long and chasing people
Me on the other hand, in my housing, also motor car electrical pursuits, have seen similar gnawings

and like cats, meeces can fit anywhere their head fits

Not sure about forty feet long, maybe counting the tail, but they grow them pretty big around here. I usually use a .45-70 to put a stop on them. The one this fellow bagged is corn fed, good eating I am told. I seen 'um bigger though.

On topic, maybe it was mice or meeces . Bit little chunks out of the diaphragm?

 

[Ez E]

Not sure about forty feet long, maybe counting the tail, but they grow them pretty big around here. I usually use a .45-70 to put a stop on them. The one this fellow bagged is corn fed, good eating I am told. I seen 'um bigger though.

On topic, maybe it was mice or meeces . Bit little chunks out of the diaphragm?