[PSUBS-MAILIST] Scuba Tank Purchase Questions

Cliff Redus via Personal_Submersibles personal_submersibles at psubs.org
Thu Feb 20 11:35:27 EST 2020


 Steve, if it were me, I would go with DIN fitting on scuba tanks.  About 2 years after I built my boat I had an O-ring blow while I was on the boat ramp ready to launch. If this would have happened during a dive, I would not have been unable to blow my MBTs by myself.  I would have had to have divers to manually inflate my MBT with open vent ports.  My experience is that most scuba shops can fill scuba tanks with DIN connections.  After the incident, I switched my MBT HP air supply to DIN values and have never had any trouble since then.  Also, last year I purchased a portable scuba compressor that came with an adapter to let you fill Yoke or DIN valves.  Also this compressor is capable of filling a steel HP tank if I want to.  To me, the real benefit of steel tanks with DIN connections is the ability to fill to a higher pressure.  If you don't need the higher pressure, then aluminum are lower cost.
We are all looking forward to your sea trials for your lime green K250.  I love the paint job on your boat.  Has she got a name yet?  I am surprised you have had any time to work on your boat with the PLC work you been doing for Scott on his Pieces 6.
Looking forward to catching up with you this year at one of the psub events.
Best


    On Thursday, February 20, 2020, 09:54:59 AM CST, Steve McQueen via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 All, getting ready to buy 2 scuba tanks for my K250. Just wanted to see if anyone had an opinion of my thoughts?
1) Choosing steel vs. aluminum (prefer its weight/buoyancy characteristics)2) While I was wanting as much air volume as possible I decided against a HP version as I have heard most places won't (can't?) fill to that capacity anyway3) Deciding on standard pressure steel 80s with K-valve (yoke fitting)
I've been watching for a while (including Black Friday) but it seems there isn't much mark up and these tanks don't appear to go on sale.
Thanks,Steve


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