[Amazon_Replica]

it will work in theory. You should coil the pipe alot inside the boiler, to maximize the surface of pipe that connects with the fire/radiant coals.

you will need a pump to circulate the water, and a pressure relief valve so it wont explode. If you can find a core from an old gas water heater you could use that.

OR, you could use a vaporizer in conjunction with the heater you already have, instead of making a boiler.