Bicycle pump air tanks.

[Fishdip]

So I have been seeing at ton of social media adds and posts for pony bottles that can be filled with a hand pump. Since you can order it online and pump it up at the water are we going to start seeing lots of scuba related injures? Also if you are out diving and you see someone trying to use one would you say something?

 

[Gone for diving]

First of all.

It's not a bicycle pump internally, usually they have 3-4 stages inside...

Also it seems everyone is selling used ones, probably because, most people don't have the mental ability to stick with the task of pumping it up and the hard work required....

If I did that all that work,
I would definitely have done some research.... and I assume the instructions would have bold print
do not hold your breath....

 

[inquis]

Good luck putting enough in to be useful. It also takes more than a bicycle pump, which tops out about 100 psi. There are 3000 psi hand pumps (air guns are one application), but bottles are measured in millimeters (aka cubic centimeters), not liters like SCUBA cylinders. It would take hours of pumping for anything useful.

If I saw one being used, I might query how long they thought it would last. Then suggest they stay near the surface until confirming that.

 

[parzdiver]

The pumps can get it up to a "usable" pressure, but it is still a tiny tank. They do also sell small electric pumps for these tanks. I have seen a few videos and reviews. The big thing I took away is the manual pump takes 20-30 minutes of pumping to fill the tank. As to the tank itself when used, it won't get you very deep for very long.

There will be people taking these down to 30+ feet, run out of air, and have no idea what a CESA is. That is the perfect recipe for barotrauma. The liability is huge. Not sure why folks feel safe selling these.

 

[Fishdip]

The pumps can get it up to a "usable" pressure, but it is still a tiny tank. They do also sell small electric pumps for these tanks. I have seen a few videos and reviews. The big thing I took away is the manual pump takes 20-30 minutes of pumping to fill the tank. As to the tank itself when used, it won't get you very deep for very long.

There will be people taking these down to 30+ feet, run out of air, and have no idea what a CESA is. That is the perfect recipe for barotrauma. The liability is huge. Not sure why folks feel safe selling these.

I am guessing its because they are all china company’s.

 

[Fishdip]

First of all.

It's not a bicycle pump internally, usually they have 3-4 stages inside...

Also it seems everyone is selling used ones, probably because, most people don't have the mental ability to stick with the task of pumping it up and the hard work required....

If I did that all that work,
I would definitely have done some research.... and I assume the instructions would have bold print
do not hold your breath....

What I have been seeing is advertisements for new ones…

 

[parzdiver]

I am guessing its because they are all china company’s.

The manufacturers probably are, and that does make it difficult to get to them, but the sellers are going to be US based companies like Amazon, Walmart, etc. They have deep pockets, but if things go class action, it gets costly.

 

[Fishdip]

The manufacturers probably are, and that does make it difficult to get to them, but the sellers are going to be US based companies like Amazon, Walmart, etc. They have deep pockets, but if things go class action, it gets costly.

I mean they are just hosting the sale of it? Heck you can go online to dive sites and get scuba tanks!

 

[parzdiver]

I mean they are just hosting the sale of it? Heck you can go online to dive sites and get scuba tanks!

Getting fills for regular scuba tanks is a bit more challenging thank "pump your own"

 

[Fishdip]

Getting fills for regular scuba tanks is a bit more challenging thank "pump your own".

for 2-300 you can get a compressor for at home use. The Interesting part is if you look at tanks on amazon it will also recommend them…