Also, breadcrumbs for anyone who might be reading this thread down the road - there are some great examples of ICs built with this tubing here: https://www.homebrewtalk.com/f51/what-have-you-built-hd-copper-tubing-442814
(Not sure how I missed that when I was searching for information before...
Thanks for the link - those might indeed be a good solution, especially at that price. They'd require looking down on the top of the kettle to read, but that shouldn't be an issue.
Just for reference, the thermowells I was looking at run about $12 each here...
I didn't mean run the two chillers in series; I'd split the hose between them as you suggested. I just meant that rather than build two chillers of different diameters that nest, it might make sense to build two that stacked.
Unless I'm miscalculating, I couldn't use 60' to make a single IC...
That's a thought -two chillers might work. A variant of that might be to create two identical chillers, each sized for 5 gallons using a double coil. For a 5-gallon boil, I could use one as an IC and one for a pre-chiller, and for a 10-gallon I could put both in the kettle, one atop the other...
I'm looking to build a whirlpool IC as part of a new all-grain system and could use some design advice.
First, the background - after years of extract-only brewing on a primitive setup, I'm taking advantage of having workshop space I can now dedicate to brewing, and am building up a 3-vessel...