I have an immersion chiller, essentially some copper tubing wrapped up into a coil. I purchased it used on Craigslist. It looks like it could be home made but I've seen that exact thing sold in home brew shops so not sure. My problem with it is it is not tall enough to reach the bottom of my boil kettle, so only the first few bottom coils dip into the wort to chill it. I works, but not very efficiently. I would like to modify it to extend the two end tubes about 6 in. Is that possible to do? And is there someplace I could take it, like to a plumber?