Introduction: Fire Extinguisher Super-soaker! (can Be Modded to Make Flamethrower)

Picture of Fire Extinguisher Super-soaker! (can Be Modded to Make Flamethrower)

I am liable for nothing you do with this. by reading this instructable, you accept that I am not responsable for your anything this prompts you to, etc.

this is how to refill a basic cheap-o disposable fire extinguisher, and turn it into a super-soaker/flamethrower.

you will need:

-Plastic-head disposable fire extinguisher
-compresser w/ special nozzle (pic will be shown later)
-electrical tape and something to cut it with
-someone to soak with this after your done building it!
-garden hose to clean it out with...sink will do
-trash can to dump old excess powder in

I am liable for nothing you do with this. by reading this instructable, you accept that I am not responsable for your anything this prompts you to, etc.

Step 1: Clean It Out

Picture of Clean It Out

spray any remaining powder in the extinguisher into a garbage can (watch your eyes - and nose....this stuff isnt good to breath).
take the garden hose and rinse it out, including the pipe and nozzle.....thise can be done be holding the lever down and spraying the hose into it.

it should look something like the picture below

Step 2: Fix the Nozzle Up

Picture of Fix the Nozzle Up

the nozzle should have a white tip. cut half of this off.

there will be a small gap between the white tip and the main black part. cover the entire white tip, and as much as possible of the black part up with the electrical tape.

now your done with the nozzle. proceed to the next step.

Step 3: Pressurize 1/2

Picture of Pressurize 1/2

fill the tank about 2/3 of the way with water. screw the nozzle on decently tigt but not too hard.

set the compesser up and pressurize it to 105 psi and NO MORE.

hook up the nozzle. make sure you have turned the valve (see pic) all the way off so the air wont leak out while your charging the compresser.

Step 4: Pressurize 2/2

Picture of Pressurize 2/2

put the compresser nozzle into the fire extinguisher nozzle as shown, and hold it very firmly with your hand, push the lever on the extinguisher down with your forearm andturn the valve on the compresser on. when the guage on the extinguisher tank stops moving, you know its not gonig to get any fuller. remove your forearm from the lever, then turn the valve on the compresser off.

you are now ready to fire!

CAUTION: do NOT make a flamethrower using this how it is. a small amount of liquid squirts out the side of the extinguisher nozzle and could cause a huge problem if it caught on fire.
and by all means do NOT NOT NOT I beg of you do not use diesel. there is a 100% chance that it will blow up while you are pressurizing it. deseil ignites under pressure, not flame, so if you put 100 psi on it, get a huge fireball.

Step 5: FLAMETHROWER!!!!!!!!!!!!!!!!!!!!

Picture of FLAMETHROWER!!!!!!!!!!!!!!!!!!!!

ok heres what you do.
theres a little pin one one side of the nozzle (see pic). take this pin out, and theres a little hole where the bottom leg was. fill this hole with superglue, then stick a little piece of something in there. let dry for 15 min. repeat (except for piece of something), and....repeat again.....and once more. you should have a nice thick layer of superglue now.

Step 6: Gas It Up

fill with gasoline and pressurize


DO not use diesel. diesel explodes under pressure, and well, your putting about 100 psi on it.........


now, hold the extinguisher in your right hand, and the torch in your left. hold the torch about 7 in. from the nozzle on the extinguisher, and let er' rip.

I'll be posting videos soon (maybe)


KennyN10 (author)2016-06-26

Well, maybe juice hot peppers and use that instead of gasoline. You wouldn't even need to ignite it to get "fire" out of it. Good for self defense, annoying neighbors or taco salad. Don't forget to use vinegar instead of water, use the hottest peppers possible, boil the juice for maximum potency and strain the pulp out well so the juice isn't so thick it jams the extinguisher. Repeat the process until you have enough to fill the extinguisher 1/2 with juice/95 PSI of air because juice is thicker than water, can produce higher/greater differences in spikes of pressure in the nozzle and needs more volume and/or pressure to push it the same distance but the extinguisher can't handle more pressure so you need more volume of propellant instead. Make sure juice is room temp before you add it to the extinguisher and compress or you you'll get too much pressure in the extinguisher when hot, too little pressure in the extinguisher when cool and weakening of material caused by extreme temp changes. The acid in the vinegar and peppers may weaken the container over time if it's not resistant to rust, so empty, hose out and check the container every few months. a bucket can be used to spray the juice into so you don't waste it. You can use the juice in spray bottles and squirt guns even if the extinguisher becomes rusty inside. Beware of ricocheting juice when emptying it into bucket. Be warned, you'll want a gas or dust mask, goggles, HDPE, rubber or latex gloves, open windows and an equal and opposing # of fans blowing air outside as the fans blowing inside or extreme tolerance built up to hot peppers, food and steam from potent acids if you intend to boil the concoction down to a thick but strainable liquid for maximum potency.

snowdrop1101 (author)2015-12-05


snowdrop1101 (author)2015-12-05

If you put water in this (or any other) fire extinguisher, pressurize it, and spray, you should notice that a few drops of liquid escape there path and fall straight down onto your feet. If this was gasoline, imagine what would happen if these drops of gas caught on fire... Gasoline shooting everywhere, things getting caught on fire... My point is that if for some reason you do make A flamethrower, make A safe nozzle that will not spray little drops of gas everywhere. Just be safe!

allmercy (author)2012-02-11

On Ebay I sell them seller ID Allmercy just do the advanced search by seller and put my ID in and buy one or two or ten.

pyrogreasemonkey (author)2011-10-06

gasoline also combusts under pressure, much less in fact, but it must be mixed with air.

pyrogreasemonkey (author)2011-10-06

also since there is oxygen being pumped in from the compressor it could fire back into it and explode, basically a pipe bomb

pyrogreasemonkey (author)2011-10-06

no fuel will auto detonate under pressure unless mixed with oxygen and compressed quickly enough that it heats up a lot. diesels work on the principle that when you compress a gas it heats up. in a diesel the air pressure goes from ambient to 500 psi in a fractoin of a secound, not enough time for it to cool so when the fuel is injected to the hot compressed air it ignites instantly. when you fill a flamable gas cylinder, first off there should be no oxygen in it, but the pressure should rise slowly so it doesnt heat up a lot.

neardood (author)2008-09-07

please do and tell me

The Musicman (author)neardood2009-03-21

i hope that was sarcasm.. he might die

C.D33 (author)The Musicman2011-01-11

diesel combusts under pressure only with heat with the right fuel air mix, and with much higher pressure. Nitroglycerin would probably explode under the forces mentioned, as would acetlyene gas...

didgitalpunk (author)C.D332011-10-06

aytylen gas bottles are filled with acetylene dissolved in water, itself disolved in rock.<>

m5industriesinc (author)C.D332011-03-23

not acetylene...... they put much greater pressure on acetylene when they put it into cylinders...

Are you sure, it dissolves pretty quickly so the pressure may be much less.

acetylene is unstable, even at room pressure, it is dissolbed in acetone in acetylene tanks if i remember currectly and the tanks are aroudn 500psi, but the pressure is being exerted directly on the gas

C.D33 (author)m5industriesinc2011-03-26

Like wtf i didnt even write this i think ive been hacked :/ i dont even no what tht m,eans lolzys

mj10021 (author)2008-12-07

Could you fill it with butane or propane instead if gas

You can fill with anything that is flammable and wont explode under pressure (i.e. diesel, jet fuel, etc.)

Any fuel will auto ignite at a certain pressure.

s.lucero (author)2011-08-23

It should be noted that ALL FUELS will auto ignite once a certain pressure is attained. Not just diesel.

twocvbloke (author)2009-04-21

Did someone say flamethrower?


Delo97 (author)twocvbloke2011-05-29

Dead video D:<

twocvbloke (author)Delo972011-05-29

Yeah, that's what happens when cyberbullies circumvent the law and attack someone for something they did 20 years ago and get their perfectly legitimate videos removed without any good reason...

godoggie (author)2011-01-02

Not sure if anyone knows, but if you take the head off of a fire extinguisher, is it 3/4" threads that attach the head assembly and the tank together?

MistaStokes (author)2010-08-14

It keeps telling me that the image is not found. Does the compressor fit in there nicely or do I need a special nozzle?

HaveFunWithIt (author)2010-06-27

Flamethrower! You have to be kidding me! This has to be the stupidest idea I have ever seen posted ANYWHERE. I wonder how many kids are going to set themselves on fire because of your post and the other extremely dangerous posts in the comments here. My God think before you post something like this. Please remove anything in your post related to a flamethrower and save a few kids from a life of pain and disfigurement or death.

Ha, I think it's kinda funny that your name is "HaveFunWithIt" but you discourage a child's ultimate playtoy: THE FLAMETHROWER!

OK I guess in my old age I have a fear of seeing someone get horribly hurt. Maybe I am being over protective. You go ahead and make one. I assume you or someone close to you will know the number for 911. Have FunWithIt.........

cchang13 (author)2008-10-20

wats the glue for?

Brettfett1 (author)cchang132010-07-08

stop fuel from leaking out and setting u on fire :)

rocksalt2342 (author)2010-03-18

use kerosene instead.

Colonel88 (author)2010-01-19

The Fire Extinguisher is pressurized... So if you start to open it foam will fly out and it will/may explode...

Gamer6460 (author)2007-08-12

You warn against using diesel fuel because it explodes under pressure, but recommend using gasoline? Do you understand compression of any petroleum based liquid propellant greatly increases its explosive potential. This is a bad idea... please don't try it with flammable liquids of any sort...fill it up with water and shoot your friends instead.

Diesel was designed to explode under smaller amounts of pressure than gasoline will......hence, gasoline is safe for using at 100 psi. now I wouldn't recommend like 500...............

how about using 99% concentrated rubbing isopropal alcohol. this would be you safest bet i think. im not sure how it does under pressure tho. anyway. where do you buy these "disposable" as you call them fire extinguishers? oh, btw with gas prices, im pretty sure the alcohol would be cheaper.

agreed. that stuff is crazy flammable.

acetelyene is use in welding torches I think the tank for it has to be concrete or cement filled as a safety precaution the thing I wonder is do you think there are any problems if I use c02 as the propellant instead of compressed air????

carpe_noctem (author)Loveofchaos2007-11-15

yeah, u can buy big 1 gallon cans of it at the hardware store.

btw, for anyone looking for a cheap buzz 'DO NOT' (!!!!!!) drink isopropynol as it is made to be poisonous to prevent drunks from getting cheap liquor

Loveofchaos (author)carpe_noctem2007-11-16

ooh kerosene?? or would it explode under pressure

Loveofchaos (author)Loveofchaos2007-08-14

oh, and on the note of buying extinguishers, what model is yours? just type whats on the label if ya havent ripped it off

check with your local fire department for the extinguishers. their the ones with the plastic heads.

erm, wouldn't a routinely compressed fuel , butane or propane, aswell as acetylene, for the higher end of the price range, come to mind, be 'safer'. and by safer, I mean as safe as a flamethrower can possibly be. instructions for use: aim away from face

i heard acetylene is incredibly unstable unless stored in the proper cylinder. The army tried to use it for something but if the can got shaken around it would blow up. Acetylene cylinders are filled with cement, and the acetylene goes in the pores. That makes it stable. I think acetylene is a bad idea, i may be wrong.

Its actually Acetone that absorbs the Acetylene and allows it to be pressurized.

oh, yeah, and if it gets shaken up, its horrible but it is routinely used in smaller quantities.... if you've ever used an oxy--acetylene torch and played with it before you apply the oxygen, you'd know what I mean, you get this foot long or more feathery flame coming from a one inch tip, using hardly any fuel at all...

Propane COMES compressed. As does Butane. I don't know about acetylene as I don't even know what it is.

audio8448 (author)2009-08-20

how do you unscrew the nozzle part from the tank

buffy (author)2008-06-01

do you think its possible to try this with a 5lbs dry chemical and the operating pressure for 5 lbs. is 195 psi do you think it can be succesfull at this operating pressure of 195 and do you think I could fill it almost to the top with water ??? and do you think i could use duct tape instead of electrical tape????

duct tape would be fine. make sure its not cheap tape tho. don't fill it to the top, fill it 3/4 full. for a 195 psi container you'll be fine, just don't go over 100 psi or so.

mine dosent have a white tip, but it does have a "barrel" looking thing that looks like it was attached on the end..i can see the i cut that off?

Joelsefur (author)2009-06-25

What is that nozzle called?

About This Instructable




Bio: I'm joining the Army somewhere between October and December 2008.
More by James (pseudo-geek):Fire Extinguisher super-soaker! (can be modded to make flamethrower)Overclock a lighter, AKA: mini flamethrower
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