Scuba Myths, My SPG Will Explode - Scuba Tech Tips: S11E21

Most scuba myths originated back in the 'stone age' when early dive gear failed frequently. Alec explains how this myth started and why today's SPGs are much safer and won't explode!

***** Alec Peirce Scuba *****

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[zropa]

Yep, instructor taught this to me, and I hear it all the time. Thanks for the video!

[lmlmd]

I heard this from my intructor back in the 90s, and heard it again on a refresher course last year as well. Just goes to show.... recieved wisdom without thinking is hell of a drug!

[OttO]

Always wondered what was that hole behind my SPG.. never touched it though.

Keep those myths epi going Alec.
Thanks for the time and effort, informative as always

[tccarter]

Thank you for all you do to support SCUBA!

[SM-oksz]

Am I the only one that hears a little Norm Macdonald in his speech patterns? Must be the Canadian DNA :)

[alan]

Watching this I remember being taught this At school at 16 now at 31 I want to dive with my instructor again and let him know about these endless miss understandings these are such high quality tips for any stage diver

[gregorycraig]

I always look forward to your videos, informative and fun. Great work.

[vukasinterzic]

Great video Alec, thank you! And happy New year! Looking forward to many more videos in 2021

[downlink]

Never ceases to amaze me the stuff you get told by someone not because they understand it, but because their instructor told them... because their instructor told them... because their instructor told them! Happy new year, Alec.

[scmsean]

I had an oceanic SPG almost exactly like that. When I started GUE training, they said brass and glass. The oceanic SPG was $40, brass and glass was around $100.

Never knew that little black thing was a bust disk.

[jacquespoirier]

in fact, the pressure required to dislodge the safety plug is very low and the restriction in the high pressure port of the regulator makes that the air blast will be very low.
that technology is widely used on liquid filled gauges that are very often exposed to suddent pressure rise or pressure impacts and it is rare that such a gauge fails from a bourdon tube cracking, what I've seen rather often is a failure by bourdon tube permanent deformation caused by an overpressure or water freezing.thus a false reading.
popularization is a guarantee of honesty
I congratulate you on approaching diving in this way.
I wish you a Happy New Year.

[Caderic]

Makes sense if you think about it. To often we take information from "experts" (Instructors, Dive Master, etc.) for granted, "They know what they are talking about after all."

Good thing you have the LABOR helping. If not, you would have nothing. LOL

Thank you Alec and Kevin!!! Great video...again!

[joshuagrulich]

Thanks a lot for clearing this up! I always turned the glass away from me since my instructor told me so. Now that I know about the rubber plug, I can do it the right way. This video might prevent future accidents!

[Will-ollp]

Great scuba advice as always. Please write a book about all your stories and put all this good stuff in it as well and I’ll buy one my friend. Like I’ve always said people of your caliber aren’t around to share this advice. We could all use your wisdom.
Happy New Year stay safe and healthy

[timgosling]

My Apeks SPGs all came with flow restricters, as did my tank pod. This may now be universal practice. With this, if you suddenly apply 3000psi to the hose the pressure in the gauge/pod itself builds slowly, over a several seconds, and there is no shock load to the system. I still have the gauge away from me when turning on the air but the risk of a dramatic event is practically nil.

[patjoew]

When i was younger that was one of my fears when scube diving haha. And thanks for the extra info :)

[kingmikeakkingoftheocean]

hey Alec can you make a video on the DRS-100B Diver Recall System speaker

[Khamcity]

Nice video to show to some instructors.

Actually there are different types of 'blow-off plugs'. I got some SPGs made from metal, which don't have a rubber plug at the back. Instead, the glass/plastic cover is just plugged into the casing with an o-ring in a groove. If the tube leaks or bursts, the cover will fly out without breaking. So in view of the second myth (how to hold the SPG when you turn on the pressure) i would say that this depends on the actual SPG.

[andershjelmpoulsen]

Happy New Year. Hope to see a lot more of the ever entertaining and educational videos

[Robert_H_Diver]

I love the myth episodes. Great work 👍🏼