Instructables

BREATH UNDER WATER WITH HOME MADE OBJECTS :O

does any one know of a way to breath under water using objects from home I don't mean like a snorkal but a full fledged under water breathing apparatus

Kiteman6 years ago
> Take a strong bucket.

> Drill four holes in the rim

> Cut a rectangular hole in the front of the bucket.

> Hot-glue a sheet of 1/4 to 1/2 inch-thick perspex on the inside of the hole.

> Put the bucket over your head. Turn it around, you plank - you need to see out the window.

> Put two lengths of string under your armpits and tie the ends to the four holes you drilled in the rim.

> Tie bricks to your feet (for safety's sake, strap them on with velcro)

> Jump in the water

The bucket will trap air, enabling you to breath underwater for an extra minute or two.

If you want to breath longer, connect a long hose to an air-compressor, and duct-tape the other end of the hose to the inside of the bucket. As long as the compressor runs, over-filling the bucket with air, you will be able to breath.
Having been a commercial diver for several years as well as a rescue diver I feel I also have to warn you guys. There is a reason SCUBA gear is not sold to uncertified people. There are risks involved with breathing underwater. Of course everyone knows what the bends is. This is where you surface too fast to allow the nitrogen proper time to reabsorb into the blood stream. But the first and most important rule of diving, be it SCUBA or commercial, is NEVER HOLD YOUR BREATH. There is a condition called an artierial gas embolism which is very nasty. This is where your lungs rupture from holding your breath on ascent, and It can even happen in a swimming pool. You do NOT want to suffer from this condition. Please be careful. Diving is as fun as can be, but there are serious risks.
I once read a story about four men escaping from a sunken submarine at 300 feet. After they exited the submarine, with their lungs full, the inflated their life vests.(No personal breathing devices, this was World War 2). They covered the distance in a little over 3 minutes. One man held his breath and his longs exploded. What you said is very true.
Oh yeah, your plan will work by the way. That is why I posted this. If the "window" starts leaking, lean forward in the water colum and put your face down. As long as you have positive air pressure, the water will stay out or will only come up so far.
if you dont mind i would like you to look at my post, your being a professional diver i believe you could severely help me with my adventures, haha, get back, maybe at email hondasixty@aol.com
You also need a neck dam. This can be nothing more than a thin piece of rubber that will fit around your neck and is attatched to the bucket.
Not "need";  as long as you don't tilt the bucket,  the air in it will stay put (like an overturned glass in a tub of water). 
westfw Kiteman6 years ago
This is actually pretty workable; even the part about the compressor (as long as the compressor outputs beatheable air...) Note however that air has a bouancy of about 8lbs per gallon, so if you use a 3-gallon bucket you'll need about 25lbs of weight to hold it under water. In addition to the weights you'll need to hold YOU under water (typically 8-25lbs for bare-skin diving, I think.) So eventually you'll be trying to walk/swim around with quite a lot of mass attached to you...
wraith39 westfw5 years ago
Absolutely correct. My dive hat (helmet) weighs close to 60 lbs. You don't feel that weight while in the water, but waiting to get in or getting out is hard on a persons neck.
warreng9711 year ago
My brother and I tried this once and it worked! Take a big pot and put it over yourself in the water, and have someone else push down on it. There is a massive air bubble inside so you can go under but just a couple feet. Make sure the person pushing down is strong or else the pot will fly out of the water and hit them
aorganek3 years ago
i have actually had an idea for this for a while and am working on it right now:
i found a gas mask that turned out to be water PROOF, and it has an IN valve and an OUT valve, i was going to tie a water hose like apparatus to the IN valve, have the end of said apparatus to a bouy or something like that at the top, and of course have a trustworthy friend protecting the end of that, with some modifications, its a full blown underwater breathing apparatus, up to a certain amount of depth, to the point where different gases are needed to survive, all i need it for is about fifteen feet, which i think will suffice
I have tried to snorkel while on a cruise in the Caribean. My problem is I can not breathe through my mouth. I have some kind of gag reflex I guess. Someone mentioned a gas mask that was watertight. I only want to be able to have my head under water like a snorkler. If i go deeper I will just hold my breath. Can i use a full face scuba mask or gas mask and put a standard snorkel and seal into the mask and leave the exhalation valve in the mask. any advise will be appreciated.
where did you get the gas mask i want to try that
It won't work, sorry. The water pressure will try to push all your air to the surface. Try this: Get a 20 or so inch tube, put it in your nearest body of water and attempt to blow the air down, you can't. Sometimes physics sucks.
what if i have a stronger hose, so that the water pressure, which is only fifteen feet, not terrible, wont cave in so easily, i think that will work, its not like im going down a hundred feet either
Sorry, you really don't have physics on your side. Diameter and solidity are irrelevant, You would be limited to under 3 ft in depth. Here is a page that might help. http://floatingclassroom.tamu.edu/classmaterials/pressure.html

Sorry bout that, I had my breathing tube bubble broken back in 1973 in my cousin's pool.
iceng jconrad663 years ago
I managed to draw air at 4' on a demo snorkel in a SCUBA course when young.

A
Bushie iceng2 years ago
What they said, above...

Water pressure exceeding air pressure means that you are physically limited to a depth of about 1 metre give-or-take (depending on the individual..) ~ say between 2' and 4' depending on how hard one can suck..

Just like jconrad22 and iceng have noted..

Breathing through a simple snorkel tube longer than 2' or 3' only happens on old TV shows. The air needs to be pressurised for anything longer, (and then regulated so you don't subsequently blow yourself up..).
Music man3 years ago
Why don't you get a small box cut a hole in the top plant a mini tree in the box seal up the box and put a filter on the hole and put a bag onto the hole using a hot glue gun put a few straws in the bag and make it airtight and breath from the straws. The mini tree will make the old air into new air use the filter to stop soil from the the tree coming up into the bag and into your mouth.
(removed by author or community request)
If that achuly worked that would be cool
Goodhart jlund2 years ago
You'd need a lot of trees as you use the air up much faster then "a" tree could provide for you.
except trees need sun light to create oxygen
iceng2 years ago
Slurping is a non PADI under water high pressure tank breathing technique without a regulator that I learned to do when young.

This is trickily preformed with hand controlled valve release of compressed air to inhale through your mouth 2" from the tank nozzle.
In an emergency situation one can grab a tank from a ships galley and jump overboard to resolve a situation.  
Actually did it in practice, hugging a tank in a pool and no black & blue lip.

A
Thank you McGyver2 for the link !!
two words.............fish bowl......................
jconrad663 years ago
When I was in high school, I stayed under water at our local diving tower, (in a lake) for around 20 min. I had some friends dump and expand gallon milk jugs and hand them to me while I was at the bottom of the lake. I would exhale, put my mouth around the top while the jug was inverted then lean my head and the jug down and fill my lungs, I would hold my breath till the next jug came down. Now as a teen, I was aware of the dangers due to copious amounts of research and I was static whilst doing this. In 1984 I took a S.C.U.B.A. class and was certified. Be warned, it isn't 1984 anymore and you can't get a basic open water diver cert for 83$ (13$ registration, 20$ equipment rental and 50$ for certification dive) I would bet it is in the multi hundreds. That is why so many people want to improvise dive equipment, cost prohibition.
techno guy3 years ago
I made an awesome diving helmet but I was wondering if you could use a bicycle pump to supply air to the person in the helmet.
aceLED (author)  techno guy3 years ago
you would be able to supply air. however i highly doubt it would be a sufficient amount of air.
kell134 years ago
i dont mean the full snorkel.i mean the place where you put your mouth on it.it comes of.then attach it to a hose.the hase has to be clean,or new,or else you might accsidently breath in rust or dirt.
kell134 years ago
you can breath under water by taking of the mouth peice of a snorkel and attach it to a clean hose.you might need some duck tape.attach the hose to the place that you are going to swim.i think this will work.i just thought of it,so im not sure.
wanderer7774 years ago
have a try. The reslluts will answer it
McGyver24 years ago
Actually there is a way. It involves a pump and a bit of hosery. www.instructables.com/id/Homemade-Diving-Apparatus/
bradnorton44 years ago
i had an idea like this once. you take a garden hose, two check valves (one way valves), a mouthpiece of some sort, and a tube. you attach the hose the tube to keep the end of the hose on the surface(via duct tape or something) and breath out of the hose. but then i thought of a problem. you would have th exhale the amount of air in the garden hose or you would just breath the CO2 back in. this is where the check valves come in. you take both check valves and point them the same way. when you breath in check valve #1 (the one closest to the hose) lets air in, meanwhile valve #2 keeps you from sucking in water. when you breath out, valve #1 closes off the air hose and valve #2 opens and allows the CO2 to go into the water instead of back up your air hose. then you just have to find some way to put a mouthpiece between the valves. does anyone know if this will work?
LinuxH4x0r6 years ago
you could compress your own air
!!

I had customer come in to buy an air compressor.
After asking what for, so I would have a general idea what he was looking at his responce was

I'm sick of paying for my boat to be put in dry dock to clean the barnicles off, so im going to use the aircompressor to breath with while I clean them off..

Note: He was note a qualified diver, knew nothing about the power of compressed air, and was intending on NOT regulating pressure, just sucking on the end of the hose with no valve to regulate at all.

It took A LOT of convincing to get him not to go that route...
No, I meant fill tank, although if regulated and filtered that would work too. Stupid people!
Be cool, dude. They're saying you can't use an industrial or home compressor-- CO under pressure is much more deadly than it is @ one atmosphere. A fact I recall reading years ago-- a dive-tank compressor intake was too close to the exhaust, with fatal results. And that's just one danger of compressed air...
wraith39 gmoon5 years ago
Yes, you can use a home compressor. You must use one that is brand new and has NEVER been run. You then change out the compressor oil with proper diving safe oil. ( Stuff is red in color and is completely non toxic. CO2 will only be present in the air supply if the vent is too close to the intake. You can add a long exhaust onto the compressor and it would be safe. The compressor would have to be hooked up to a volume tank for safety reasons. We always used bottled air for a back up whle I was working with Oceaneering. If the compressors went down, we switched over to the bottles. The guy on the bottom was never aware when this happened because we had that volume tank in place.
gmoon wraith395 years ago
If you say so.

... but most divers I've known were more concerned with CO than with CO2...
wraith39 gmoon5 years ago
I'm sorry, that was a typo on my part. Yes Carbon monoxide is what I was reffering to when I said to raise the exhaust. Believe me, THAT is where the CO comes from, being sucked into the intake after being blown out the exhaust.

One other thing that makes it hard to use a home compressor is the flow rate. Most home compressors can't keep up with a person's breathing. Those that can are pretty pricey. Also, I'm not so sure about a SCUBA regulator, but I believe they are the same as the regulator on a diving helmet. You must have 125psi over bottom pressure in order for the regulator to work properly. Every 34 feet (fresh water) adds another atmosphere (14.7psi) of pressure. (33 feet of salt water). So at 34 feet you would need a compressor pushing 154.4 psi at somewhere around 12cfm. I can't remember right off the top of my head the volume of a average person's lungs, but I can look that up for you if you want me to. (It's in the Navy Dive Manual)

By the way, that diving safe compressor oil is called monolec oil. You can seriously drink the stuff, although it tastes pretty bad.
To elaborate on this a little, a compressor takes atmosheric air and compresses it. Therefore, anything in the air will be present in compressed air. Since carbon monoxide is NOT common in normal air, the only risk of it being present in compressed air comes from the compression process itself. The only way for CO to get into the compressed air is for it to have been sucked in from an exhaust. You cannot filter CO out of the air. You CAN scrub out CO2, but not CO. You may be able to eliminate most of it, but partial pressures of gasses (the way gasses react under pressure...sort of) is very tricky. It's those partial pressures that make O2 toxic at depths greater than 60 feet (40' to some people). Leaving a trace amount of CO in compressed breathing air can be deadly because at depth the amount you are actually getting changes. Leaving trace amounts of CO2 isn't that big of a deal because we breathe CO2 all the time. But CO in any amount is a big deal. It's those kinds of things that really should be learned before experimenting with diving. Then, once you know the risks, you can look at ways to overcome those and achieve a safe homemade product. Just please keep in mind you are dealing with life support. What works in a pool may not work in open water. You may only get one mistake.
no, I meant the customer who wanted to buy one to use with a hose.
I read it they way you wrote it... Yes apart from the regulation issues, I didn't think he would like the taste of oil. Did seem a bit stupid. ;)
. The pressure is the least of his problems. "Normal" compressed air contains fairly large amounts of CO, some NOx, and varying amounts of oil mist. Compressed breathing air is scrubbed and filtered.
No, it is filtered for water only.
jtobako6 years ago
Depends on how long you want to stay under. Barrels and large bags of uncompressed air were used for underwater salvage long before scuba gear. Modern Mechanic blog has several old-style diving outfits for the DIY, but take a look at the comments for some design improvements.
Barrel .... Good Idea...... **evil fingers** MUHUHAHA

and I am not a pressure expert but If you cut a hole in the bottom you could have an oxygen tank in there and the excess air would just go out the bottom.... better Idea Two barrels One for oxygen and an electric motor...........
Keep in mind oxygen is poisonous at depths greater than 60 feet. And toxic to some people at 40 feet.
guyfrom7up6 years ago
you could have a car battery and produce oxygen under water, but then you might become High, and that wouldn't be good under water, now would it. ehh.... you couldn't really... cheaply. You need special pressure regulating valves and such.
how about using a air tank thing from a nerf gun like the long shot just keep your finger over the exit so the air wont escape and when u need it bring it to your mouth and breath in it will only give u a small breath but you can still stay down a little bit longer
=SMART=5 years ago
hahah when i was 5 i thought i could breathe internally !
Smartkid095 years ago
I am a teen and did just that. I took a few feet of flexible tubing, thick enough to breathe from, and taped it to the bottom of a 3ish gallon bucket. I then tied about 45 LBs to the bucket. Then I clamped the tip of the hose shut and gently lowered the bucket into the 8 ft deep end of my pool. Now to use it, just swim down to the bottom, take off the clam and quickly put it in your mouth. Considering you can totally deplete the bucket of air in just 3 breaths, I breathe the air back into the bucket. This is dangerous though so never do it too long and always be watched. I can do this for about a minute and a half until I can feel your not getting as much oxygen as your body wants (don't want to push it since you'll pass out from too much CO2 and being underwater thats not good). Since the air in the bucket is at the same pressure you are, you can breathe. If you go three feet above the bucket, theres no way you can push the air back into the bucket. when you are done breathing, try to clamp the hose because trust me, 45 pounds is really hard to swim with. If you dont clamp the hose all the air rushes out. If you do clamp it, swim back down and pick the whole thing up will be very easy with the air to help. I have been working on a way to add air to the bucket so you don't have to put CO2 back into the bucket and would be able to do that forever. You may think this is stupid but its really a neat feeling just sitting on the bottom of your pool. Like I said, I'm a teen and I've never been SCUBA diving and this is fairly close. Hope this helps
Be careful kids! You seem to have a pretty good grasp on most of this, but when it comes to trying to breathe under water you never can be too cautious. Always having someone there to watch you is essential. My wife and I both have advanced SCUBA certifications, and I've pondered stuff like this. I've also considered running an air compressor down to the bucket (or just to a regulator). I'm always interested in underwater pursuits, but seriously BE CAREFUL!
Also, why use flexible tubing, if you go to deep, the pressure will crush the tube..
westfw bumpus5 years ago
The hose doesn't collapse, because the pressure inside has to be about equal to the external water pressure (or you can't breath it anyway, cause the pressure keeps you from inhaling.) (this does mean that the tube is subject to bursting at the surface if you're delivering the air from a surface source...) The main function of a SCUBA regulator is to deliver you air AT THE SAME PRESSURE as the water around you. And this is why you don't hold your breath while SCUBA diving - ascend a few feet and the expanding high-pressure air starts bursting lung internals. ("A few" is about 3 feet, BTW. It doesn't take much to internally over-pressurize your lungs.) (hmm. Looks like I said most of this before, back when the thread first started. But it's already typed and worth repeating!)
Well, I said in there this is for a 8 ft pool. If your going in deep water, you'd have to keep the bucket with you, and you would probably tip it and loose your air. Also, I made this from stuff around my house and we have no compressors or special tubes or anything
I'd use pneumatic hose (like for running air-tools). It would allow you to go fairly deep. I'd just be absolutely sure there were no conaminants (oil, etc.) or debris in the line.
...What a pointless bump. :-\
scubascooby6 years ago
Learn a lot about diving physics and physiology before attempting anything like this. There are so many wonderful ways you can end up looking stupid or dead or both (Douglas Adams).
Goodhart6 years ago
Just don't try holding an entire inverted canoe underwater to breath the air.....you and 3 other people will not be able to hold it underwater.
SUBMARINE ?
You could weld yourself a nice one. LOL
Beer can submarine........
go get a 2L bottle then drill a hole in the cap the size of a bike inner tube stem. put a bike innertube stem in the hole, then seal it with some glue. then pump it up with a bike pump to about 60 PSI tie some weights to it when ur underwater just push the pin in the stem and it will shoot out air. so just put your mouth over it with your finger in your mouth and push the pin to let air out.
thejrb6 years ago
If your not going to deep you could use a hose or something. You could have a buddy on top of the water with a bike pump or something to push the air down so you don't damage your lungs.
CameronSS6 years ago
You could go old school...
westfw6 years ago
A scuba regulator isn't very complicated; probably within reach of of a good home machine shop. But there's SO much that you could do "a little bit wrong" and end up killing yourself. Read a couple of books on SCUBA diving (preferably somewhat OLD scuba books, when they taught some physics instead of just "sport rules.") The main problem is that as you descend, the water exerts a lot of pressure on your chest/etc. Get (your chest) as little as two or three feet under the water and you could no longer breath through a hose connected to the surface, because the pressure on your chest would be higher than the air pressure. The whole point of a SCUBA (or other) regulator is to deliver air to you at the same pressure that the water around you is exerting. (of course, that means if you come up to a lower pressure area while trying to hold higher-pressure air in your lungs, alveoli start popping like balloons, which can also be fatal in as little as 3 or 4 feet of water...)
Lftndbt westfw6 years ago
That was a perfect comment. Just prior to me finishing mine.. LoL
A BALLON lol,

Hmm How long do you plan on staying under ? and how deep do you plan on going? I have made an apparatus from the valve in a powerade bottle and it came out alright.... You need to have an input an an output out put is best pointed down and input well thats obvious either up or to an oxygen tank.