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Step 4Form the coil.
Now comes the fun part.
This step involves making a tighter coil out of the copper tubing, one that is as large as possible, yet still just able to fit in to the dimensions of the cooler.
I chose a coffee can to use as a form, it seemed like a pretty close fit.
Start by unwinding several feet from the coil, and holding the end next to your form, slowly start shaping the tubing around it. Be very careful and take your time, if you kink the tubing, it's done, there's no un-kinking it.
Leave several inches un-coiled on both ends, as you're use this length to attach to the inlet and tap sides.
When you get it all nice and wound up, you may want to attach Zip-ties every turn or so to have a little bit of preformed space between the coil. This should expose a little more surface area to coldness and help out a bit. Completely optional step.
This step involves making a tighter coil out of the copper tubing, one that is as large as possible, yet still just able to fit in to the dimensions of the cooler.
I chose a coffee can to use as a form, it seemed like a pretty close fit.
Start by unwinding several feet from the coil, and holding the end next to your form, slowly start shaping the tubing around it. Be very careful and take your time, if you kink the tubing, it's done, there's no un-kinking it.
Leave several inches un-coiled on both ends, as you're use this length to attach to the inlet and tap sides.
When you get it all nice and wound up, you may want to attach Zip-ties every turn or so to have a little bit of preformed space between the coil. This should expose a little more surface area to coldness and help out a bit. Completely optional step.
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