Hand Pumping To Fill A Tank? - Scuba Tech Tips: S12E04

After the videos on mini scuba tank systems, viewers asked if a full size scuba tank could be filled by hand pumping? Alec shows the considerable effort and time to hand pump a 80 cu/ft tank to 3,000 psi (12 L to 207 bar), but is it worth it?
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[@fathom493]

Never clicked on a video faster. One of these days you gotta show us how to make a DIY compressor, using only a bike pump and lawn mower engine.

[@ginoturrella9985]

Being a certified Master scuba diver and an assistant instructor I would have to say after listening to this RUclips the guy is correct. it's not wise because the filter is not the right one to scrub the air. It can be said that a four-stage hand pump can be used to fill a SCUBA tank in the event someone does not want to dive deep. The parts per million of noxious gases all depend on the atmospheric pressure. The deeper one goes the more dangerous even a small amount of noxious gas becomes. What is breathable at 20 ft can be deadly at 80 ft. It all depends on how one approaches it. It's not recommended and too risky.

[@youtubehandle_kate]

The more I watch Alec, the more he reminds me of Bob Ross!

[@GIJOE573]

HPA hand pumps are perfect! you save on your air fills, you save on your gym membership and you get a nice long surface interval

[@terl0th]

One thing you didnt mention, is that it gets harder to pump with rising pressure in the tank. Depending on your weight (and strength, but mainly weight), you wont even be able to get the tank to 3000psi. That goes for tanks of all sizes.

[@paulclose5544]

4 hours so stretch it out to 3 or perhaps 4 days off and on hand pumping so you don't overheat your pump.

[@azuresquish3682]

With all do respect for a person that weighs 115 pounds and is 5"10 my pump slides smooth and I can fill my 4500 psi tank in around 40 minutes my pump does heat up because of the pressure giving it a 10 minute break in between every time it heats up but if your wanting to save a little money on refilling your small tanks especially if you use them frequently it's a very good option

[@Will-ol9lp]

I dive Nitrox so I’ll just keep supporting my dive shop. Even if I did use Nitrox I would still bring it to the dive shop. Forget that pumping junk stuff. Suppose someone is pumping there scuba tank and there is a car or truck running near by??? I would only pump if I lived on a island all to myself and there was no dive shop around lol

[@nwced]

I've also read that the closer to full you get the more the resistance you will have as the pumping gets harder and harder as the pressure builds

[@Chris-mg3hi]

What about the cheap eletric pumps?

[@HenryBass]

Think about a 1 liter soda, and think about a box 1 foot by 1 foot by 1 foot. Clearly, a liter is much less than a cubic foot. 1 liter = 0.0353 cubic feet. 6 cubic feet = 169.9 liters. A fish tank measuring 1 foot h x w x d holds 28 liters of water. So where’s the error? 1 liter is 61 cubic inches, so that’s off by 10x. Maybe the bottom line is that tanks and pressure devices made by unregulated foreign sources cannot be trusted!

[@ZaspoxZaspox]

Hello i have 2L smaco tank and smaco compressor, does that set needs open valve for refuil? I appreciate your time reading my comment and hope for the answer, João from portugal

[@user-ox2ti7hz3h]

thanks pops, good thing i heard 1st before buying from amazon hhahaha didnt really think that its dangerours

[@rjonkipper]

My experience is these pumps aren't practical, 20min to hand pump is no good, but tranfering air from a larger scuba tank works well...

[@Technonsia]

every day 20 minutes on a 12l bottle. make you capable of doing a weekly small swimming pool dive :). and staying in shape😂

[@liveandlearn8854]

OKay, so i know nothing about nothing when it comes to diving and yes i will actually do a course before i get one of these thanks but..... can't you fill a scuba cylinder with an air bed pump?

[@yveslegault6825]

Let us assume the cylinder is at 2,000 pound per square inch.

[@shred_meister]

Looking forward to my next season with a mini tank still learning the basics so thankful I got an electric pump

[@xam113w]

I use a hand pump to fill my pcp airgun, with an air volume of only 112 ccs it still takes about 5 minutes to get even that small volume to 3k psi.

[@mrDmastr19]

Probably a bad idea for people to fill their own tanks regardless of it being manually or mechanically. The first thing people will do is slack off on visual inspections, then hydros, then people will be diving with bombs 💣