How Auto Shoulder Dumps Work

[@RobertAgarHutton]

THANK YOU !!!!! - I'm in the middle of doing advanced open water with added dry suit speciality and although I'd been shown what to do, I didn't understand WHY or HOW - now I do and I feel much more confident about the remaining dives I will be doing.

[@ScubaDiverMagazine]

I love a good auto-dump, you don't need to think about your buoyancy while ascending, it just does it all by itself

[@lukeb6721]

Great video! I was taught with a cuff dump 15 years ago and am trying to learn about the now common shoulder auto dumps. Thank you for explaining it so clearly!

[@intrimscuba]

Beautifully explained mark, very informative and unlikely most divers will have had such in depth analysis of the workings of a OPV... Well done mate 👏

[@ivoryjohnson4662]

Thank you Mark for educating us. I know for you it sounds like a broken record. But for us it means so much.

[@Yggdrasil42]

This was great Mark. Thank you.

[@josephdracula7487]

😎👍🤿wow! Thanks I don’t know Much about dry suit diving but I enjoyed the subject!

[@SuperScubaTim]

I wish I still had my Fourth Element Sub Xero!! Without a doubt the warmest under suit ever.

[@geemac44]

# Askmark., can shoulder dump values be retrofitted and if so can you buy a kit to fit yourself or is it best to have it fitted professionally? Thanks for providing these valuable videos. Looking forward to many more.

[@ScubaDiverMagazine]

Sure, you can fit replacement valves pretty easily yourself. There are usually special tools that make it easier. If you notice around the base of the valves you can usually find small notches that these tools clamp on to to make sure you have a tight fit. Also be aware that there are different size holes so, you can't fit just any valve to replace any valve. they're typically named Apeks or SiTech as far as size. And one is larger that the other. So it's best if you know what you're replacing first before buying the wrong size valve

[@leemiller358]

#ASKMARK. Nice detail on the dump values. Question for you and 3 min of you time (for the linked video). I recently switched from back mount pony bottle to side mount. I'm trying to fine tune in pre-dive season pool sessions. What do you recommend for better aligning the pony bottle with my body? This is an AL 30 and it is a little low on gas (1000 PSI or 70 bar). However, I don't think it should be that out of trim. Standard rigging with a bolt strap on my shoulder D ring and one on my belt D ring. I have a loop of bungy running from the back of the BCD under my arm around the pony value and to my should D ring. kzbin.info/www/bejne/onW9Y3WPgrmCi7s

[@ScubaDiverMagazine]

We've all been there. Small Ali tanks can be feisty to keep horizontal as all of the weight is at the valve. In an ideal world I'd move that D-Ring on your hip further forward and also move the jubilee further up the cylinder to help bring the bottom of the tank down to your hip. There's a pretty comprehensive blog here that should be able to help you out scubatechphilippines.com/scuba_blog/ultimate-guide-sidemount-cylinder-trim/

[@leemiller358]

@@ScubaDiverMagazine Great resource. Thanks for sharing.