DIY HHO Torch (Water Torch) for Only $4





Introduction: DIY HHO Torch (Water Torch) for Only $4

About: Hi I'm Angelo! I am a college student taking my engineering majors in BS-EE/ BS-ECE at the DLSU. I use my course as an inspiration for making my current projects! I've been posting projects here ever since I...


In this Instructable I will show you how to make a simple, cheap and effective HHO torch that can melt small pieces of metals like tin cans. This can be used in various applications it can be connected into your fire torch or in your car which is also known as the HHO Hybrid Generator which can reduce your fuel consumption although I don’t have a car I am still a 12 years old boy.


A lot of people are asking what and how does a HHO Torch/Generator works. It is simple a HHO torch/Generator separates water molecules into gas, now you will have a mixture of Oxygen and Hydrogen gas which can give a powerful kick or flame.


- You can connect this in a fire torch pin which I will show you how to make.
- You can use this for your car to reduce fuel consumption. But this will not be mentioned for this Instructable, it would be better of you Google it.
- You can use this to weld o melt thin metals

Warning: It is not my responsibility if any of you gets injured or burned so don't blame me for your mistake. Luckily I made some safety features which are already tested and prevents some common problems with HHO converter like explosions and implosions which creates cracks or even explosions. Hydrogen are highly explosive especially of you mix it with Oxygen. Batteries not included.

Be sure to rate this a 5 star. This instructions are very rare and hard to find.

Step 1: Materials

You Will Need:

- Vinyl Tubing/Fish Tank Tube 2m (50c)
- Air Tight Container x2 ($1) 
- Fish Tank Tube Connectors x3 (30c)
- Stainless Steel Plates x12 ($2)
- Wire 1m (20c)
- 12 Volts Battery (revised)
- Inflation Pin (10c)

Step 2: Cutting the Metal Sheet X12

Cut the metal sheets into 12 pieces. The measure should be a 2x4 inch rectangular sheet. Then cut a line above leaving a small metal for the wire to be connected.

Step 3: Stacking the Metal Plates

Stack the metal plates with a 1 cm styrofoam on each sides and one in the middle, use a hot glue gun for bonding the metal plates and the styrofoam. Then connect the the metal terminals with Magnet/Copper wire.

Step 4: Installing the HHO Converter Plates

Place the HHO Converter in the air tight container. Then make a hole for the wire and be sure to seal it with a hot glue gun.

Step 5: Adding a Tube Connector for the Air Tight Container

Make a hole for the tube connector. Then glue the tube connector.

Step 6: Making the Bubbler (with Saftey Feature)

Get a jar then make two small holes for the tube connectors. Seal the tube connectors with a hot glue gun and be sure to connect a tube for the inlet. Then make a rectangular hole and seal it with a cling wrap with hot glue.

Safety Feature: The cling wrap serves as a safety cap. Most bubblers explodes when implosion occurs. This prevents this from exploding.

Step 7: Making the Torch Pin

Get a inflation pi then connect a tube connector, then seal it with a hot glue gun or use epoxy for better results. After that connect all the tubes to is proper connection.

Step 8: Your Done!

Your Done! You may want to add a switch to the battery.



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    Cool project, well written and documented. I've had a build for one of these on the agenda for a while, because nobody answers any questions about them.

    Compared to a normal torch how would the flame be, in terms of heat and gas flow?

    2 replies

    This type of torch should produce 5000-6000 F

    little bit late, aint it?

    Nice ibble'! I really wanna try it but in Singapore, 12 year old boys like me aren't often seen cutting steel and making a torch...

    3 replies

    well now that you're 18, I hope you give it a try :)

    PS: The clingwrap pressure valve was ingenius!

    AWESOME! This is a very good Instructable! Thanks, I will try to do it!

    Best guide on making HHO torches. Thanks this is just what I need.

    OK. I have a question. It says to use 12 plates, yet you have 14 plates. Why is that? Thanks.

    What is the purpose of the bubbler? could I exclude it?

    3 replies

    The flash back is just that.

    The burn speed of hydrogen / oxygen is very very fast compared to the normal range of liquefied gas sources. It is like a little uncontrolled explosion and all the flash arrester will do is to kill the heat and remove the source of ignition, thereby removing one leg of the fire triangle and keeping down the death rate. With most slow burn fuels you can get an idea of the speed of burn by adjusting the oxygen / air supply and watch the flame base lift off the tip of the torch.

    Yes, but you will be at risk of your whole setup exploding when you ligth the torch

    Think of it like an opto-isolator or simple diode. While it could be removed and the torch remain functional, it's about as advisable as driving a car after removing the brakes and steering wheel., sans seatbelt If, for some unfortunate reason, your flame were to enter into the tubing (too close to your cutting surface or not enough positive gas pressure could both cause this (really, these are both the same thing)) it would travel down the tube and then -- in theory -- be interrupted by the bubbler. Without it, it could travel all the way back to your gas source. Remember, fire requires oxygen to burn, but we're supplying more than enough oxygen inside the line from the electrolysis to fuel our flame.

    Just one thang am I able to connect it to my propane torch for a hotter flame

    Nice. I have something similar and used an inflation pin but I keep getting flashbacks. Any ideas? Does this happen from too little HHO flowing?

    2 replies

    No, this just happens due to burning. The same thing would happen during welding except that you have a backfire/flame arrestor. With this design you will also not have stable PSI which is possibly another issue. Not using an arrestor is dangerous. You can either use an oxygen/hydrogen arrestor (used for gas welding) or appropriately a Gas Torch Mount Flashback Arrestor (I would suggest the latter but either would be better than none and the welding one should run around $10).

    Thanks for the reply. I did have a flashback arrestor similar to what is shown in the picture - a jar with the gas running through the water. But the flashbacks kept blowing the lid off the jar. I tried to let it run for a few minutes first to see if there was a problem with air mixture. Maybe it's something like what happens on a vehicle? If there are any leaks in the exhaust the car will back fire. Maybe I don't have a well sealed line?