Diving The DEDEPU Air Tank - Scuba Tech Tips: S11E13
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- Опубликовано: 19 окт 2024
- There are several models of mini-scuba tanks available. Alec tries the DEDEPU, 0.5L air tank in the Scuba 2000 pool to see how it works.
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Just make sure you fill it using your dive buddy’s tank 😂
For sure.
Have a spare tank to fill it.
Usually the smallest person uses less. 😛
Hi Alec. Hope your doing well in these trying times. I miss the regular output of your Tec tips and reviews, or better put " opinions" of various items or techniques on diving. As a veteran diver I realize you have a lot of knowledge to share with us and your shared opinion, "and I'm certain I speak for the majority of your viewers" respect your outlook. So thanks for doing what you can as far as getting these videos out there for us. Trippel Thumbs up to you.
Thank you very much Gee. Notice NO ads, requests for subscriptions/likes or sponsors. I do get asked a lot to do paid reviews of real crap but I'm 72 and want to share what I know while I still can. Appreciate you watching sir.
Excellent review. I have always wondered about them. They appear to be a much-cheaper-priced Chinese knockoff. I own two Spare Airs. I mostly use them while on my boat for checking my boat anchor to be sure it will hold or to unsnag it when I am not planning a scuba dive. I consider them a scuba "toy" because they don't hold more than 5 to 8-minute's worth of air at 4 to 6-feet underwater.
You hit the purpose of these right on the head. I wanted to educate divers that these exist and have a limited scope. Some divers think they are primary scuba tanks, NOT. If you can't stand up your going too deep.
I like it. I train swiftwater rescue and I get made sport of for having a spare air on my pfd. (I have no idea why). Wait till they get ahold of me cruising the Dedepu.
Carrying a redundant air supply is not something a diver should laugh at, they may need it before you! Thanks for sharing Brer.
Hello Alex!
Not related question if you please. How do you think is it good idea to buy thin wetsuit (Lycra) to wear it under rent neoprene? Or neoprene wetsuit must be close to your skin? May I overheat with 2 wetsuits on?
A rash guard under a wetsuit is a good idea. Pulling a wetsuit on is much easier and you don't loose the warmth as the rash guard (lycra) is very thin. It should not cause overheating as the warmth from a rash guard is very little. Give it a try and don't forget the nylon socks to make pulling full height boots (5 to 7mm) much easer too.
I use a dive skin under my 3 mm and 7 mm wet suits all the time, and those nylons socks too!
I should I have this in my vehicle. I carry everything else with me for emergencies.🤣
Could be useful in a fire emergency. You must have a big truck.
hi from cairo egypt . I like you vedios . THANKS
Glad you like them!
Guys relax a little bit, Alec made a separate videos describing that this little scuba unit isn’t safe for an out-of-air situation. It’s just for a little fan. Also several guys mentioned that you fill it from your tank. Obviously you only do that if you are not going to go diving with your normal gear but want to have some fan on the shore, otherwise you ask the dive center to fill it for you. Spare Air and similar devices never took-off in diving because they’re simply too small to make a safe ascent in an emergency. However, it is still better than nothing if you ever find yourself in one of those bad situations and your dive buddy is nowhere to be found...
Yep!
Alec
Very Nice Video😍
Thank you!
A
I've bought this item (Dedepu 1L), and used it in the swimming pool (1.5m) twice. It lasted me almost up to 10 min. The feeling is still wired to me as I'm new to scuba. I could fill it with the manual pump to 3000PSI, it took (1500 cycles)🤔, yet it works, took me 3 sessions over 2hrs.
My concern is whether the air that comes out of the manual pump through this fitting is safe, or kind of unhealthy? How often should I change the filters? Is there special oil I should use to lube the pump?
The pump comes well oiled, is that oil safe to breath?
I'm still testing the set, and improving my usage. Once I find out anything interesting, I'll be telling you here, thanks.
One more thing, I've emptied the tank totally while swimming. I herd you saying that's wrong, so should I do anything to counter effect that?
Guess what? I have video coming, S12E04, where I specifically talk about hand pumping scuba tanks. I think you will like it.
@@AlecPeirceScuba_SeaHunter OMG, Thank you so much. Please, try to cover all the issues I mentioned above in the video.
I have to wonder how many times Mike Nelson could have used one of these.......
Thanks again guys.
That's easy - since Mike could hold his breath for about 20 minutes, he didn't need one!
Alec
@@AlecPeirceScuba_SeaHunter He must have been one heck of a kisser! No wonder the ladies loved him.
I would not use it out of the box!!! I got the smaco 1L tank and i take the first and second stage apart and saw that the regular is not clean enough Machined.
There's a chance to inhale metal particles.
So i re-machined the regulator with a drill and dremel and now my tank is ready for save use and it works great.
And you also can take a old hose and attach a air pistol to it for cleaning your console, computer ...
I hope you will understand what i mean, English is not my language
No problems with your English and thanks for sharing your experience with this. Like any new scuba equipment, read the instructions, check it over carefully for problems (like you had) before betting your life it will work when really needed. Take care.
i have a carbon fibre 4500psi 67 cu inch tank for my paimtball gun i wonder if with the proper fittings i could use that?
Best not to use carbon fibre for diving, salt or fresh. They are not nearly as popular as steel or aluminum. Maybe someday we could buy a 5,000 psi 60 cu/ft steel tank. That would be cool.
A.
Did you need to hold the purge down to breath, or was it working with just normal breaths?
Normal breaths but I was ready just in case because Kevin does not like doing more that one take!
I see this being good for free divers as a panic button
I'm no expert but the free divers I see carry nothing. But a buddy should have an emergency air device just in case.
That wouldn't work for us. If you run out of air you black out without any warning. So you can use the "panic button" That happens only close to the surface and than we float up our buddy turns us around everything is good.
If you actually panic down deep and you'd carry that you suddenly breath compressed air. That means you have to ascend like you scuba divers do. We know nothing about that and would most likely damage our lungs.
And even if you know how to ascend it's not much air anyway.
Carrying that as free diver would be very dangerous
@@urbaniv honestly it wouldn't be dangerous with some basic knowledge. And could be useful for safety
@@cracka5431 not really. Especially because freedivers don't run out of air down below. That just never happens. You black out shortly below the surface (in the last 10 meters) or after you break through the surface. Never below. You don't run out of air like in scuba diving. If you run out of air you just do from one second to the other without any warning. So no this bottle is useless and would only do harm because you'd start panicking and think you have air so you let out your last air. And than down below you breath in new air at this specific pressure. Etc
@@urbaniv I've been freediving for almost 10 years. So I have some experience. Shallow water blackout is cause by a lack of oxygen to the brain due to the pressure difference as you near the surface from a deep dive which draws oxygen from your blood.
I've saved one of my mates lives because he pushed his limits on a deep dive. Shallow water black out never occurs unless you've gone beyond your ability in deep water. By having a few breaths before ascending you would eliminate shallow water black out.
You call it a sort of spare air, however it is not and only for shallow waters.
What happens to the cylinder if it is used (or just carried with you) as spare air and you are at lets say 65 feet deep?
"Spare air" , is a brand name, and make small systems like this , and has almost become a generic term for such small systems as they were the only ones making them ... 🤦🏻♂️ this unit is pretty much identical as the one made by spare air and at a fraction of the cost , I have been looking at them recently ..
It is a clone of the the famous SpareAir (40 years old now), used by many divers and others for fun, shallow dives. If used like SpareAir as a redundant air supply, its max depth is around 60' to safely surface slowly in an Out Of Air emergency. Like any toy or scuba gear, read the instructions and follow them. Thanks for watching Stefan.
Could be used in case of fire smoke !
Yes. I know a friend who has one under their bed in case of a home fire as they are far from a fire truck.
Actually, that would be one practical use that offers no risk.
Will a dive shop service the regulator and inspect\hydro the tank for me yearly? Are there legit quality service kits available and for how long?
As these are not actually scuba diving tanks, they don't require the same annual VIS and hydro test. If used a lot, maybe not a bad idea to get it visually checked every few years. As for service, other than an tank valve o-ring, nothing really you can do to these sealed units unless they actually stop working.
Experienced Scuba divers surely do not need this; you can only fill it from your Scuba cylinder, you're therefore not altering the amount of gas you take underwater, and a reserve is what you set on your dive computer. If you need an independent reserve you'll have a stage or a pony with a proper reg. For unqualified, including children's use, it will give a few minutes fun at shallow depth but I would not be happy seeing it used at more than say 10 feet. Breath holding from just 30 feet can cause serious lung injury. By the way Alec, is it a demand reg mouthpiece? It looked like you were pressing the purge to breath.
I suggested that I'm not a fan of Spare Air (or this copy).
I'm just doing a review here as requested!
For the record, I'm also not a fan of pony bottles either, although I've used them on occasion.
I AM a fan of planning your dive carefully including air supply and watching your air pressure throughout the dive.
Alec
What about divers like myself Tim?
I work for the government as a Diver, if they can get the job done with a single diver, they will. Obviously I plan each dive meticulously, even moreso when I'm alone, but what if something goes wrong with my gear when I am in a quarry 25m (82 feet) down? It hasn't yet, nor have I ever finished a dive on 0 bar, but it could happen tomorrow.
One of those may only hold a few breaths at that depth, but that means my body will not be starved of air during an urgent ascent. I can see it's benefits for an emergency backup, albeit with severe limitations.
@@diverdaniel5025 I'm sure that as a professional you would never dive without redundancy in all critical parts of your rig, including having a separate bailout bottle and regs. But would you go to Walmart to buy them, given that when/if you actually need to use that redundancy you will be under stress and will want it to work as well as if not better than your primary?
Sir/can order like that to you and how,im from philipines....
This and devices like it can be ordered online from many sites like Amazon and eBay.
Alec you uploaded this video last week also :)
They other video he was reviewing the Smaco with foot pump .
Close, that was a smaco with a much larger tank and hand pump. Wanted to get these out for those considering them as Christmas gifts to think about them carefully first.
Alec Peirce Scuba please excuse me, they looked so similar!
Please could you send me the dedepu 0.5l user manual because I lost my manual??
Available on their site. docs.dedupe.io/_/downloads/en/latest/pdf/
A
I wish you would have touched on the dangers these types of units present to non certified divers. After all thats there main market. Certified divers have little use for one of these.
I do not like there is no way to secure it in place during use. Seems like it could too easy come out of your mouth.
@@toriless i think it's possible to strap it around your neck with the velcro strap
My point is these are not scuba gear but toys with limited functions. Certified divers could use these as a redundant air supply, just like Spare Air, for shallow (up to 60') depths. These exist in great numbers so be aware of them, their limits and like most toys, have some fun. Thanks for watching John.
My bottle from the argon dry suit inflation system is bigger than that toy :)))
So is my AL80. Might as well just use that?
It may be but the two have completely different purposes. You got it right as these are toys, not scuba gear.
Nice .. But how much they asking for it
That can be found by a Google search. I don't receive any refer fees so pick the one you like.
@@AlecPeirceScuba_SeaHunter Thanks ....
I never liked the market for these small tanks as they cause a lot of beginners to buy them and do dangerous stunts.
Like any product, these can be fun and safe or dangerous. Read and follow the manual + use common sense. These are not 'diving tanks' for scuba folks.
@@AlecPeirceScuba_SeaHunter I wonder how deep they are rated? Still, my main concern would that first 20-30 feet where you have the biggest percentage of pressure change which require practice with equalization, buoyancy changes, etc.
I think the not certificate for PADI scuba diving and China quality.
The better spare air have certificate for PADI
made in USA
Spare air is celebrating 40 years, good for them. These new mini-tanks products are for fun in shallow water, not as a primary scuba tank. Pick what you prefer but think about how many folks will pick cost over quality or country of make.
@@AlecPeirceScuba_SeaHunter If there was a was to secure it to your chest with a short hose there would be some snorkeling adventuress where it might be useful for those that are not full free divers but does not justify a full SCUBA equipped setup. Still, I am glad I have some training if I ever used one.
Joe Biden better get tested after DJT tested positive for covid-19.
Why are you here?
No politics on my scuba channel please. We can argue split fins and Frog Spit but not politics.