I could hook up my whirlpool recirculation to go through a counterflow while I was running the immersion...
Anyone do this?
Neighbors hose!You have an immediate technical problem in your water supply's rate of flow: no matter how many hose outlets you have on your house, they're all being fed by the same 3/4" pipe in your basement/crawlspace, 1" if you are exceptionally lucky. The pressure coming through the meter should be constant, and most of it goes into your hose.
This means that if you open a second hose, the pressure is divided between the two hoses, which reduces the efficiency of both chillers by around half. If you have a 1" mains pipe, you'll have a slightly smaller drop, but only if the pipe doesn't drop to 3/4" before the lines to each hose diverge.
So to do this, you'd need a large reservoir tank of cold water, and a pump to generate the pressure needed to drive the second chiller. This is a lot of expense and work, because...
Immersion or counterflow alone is already "good enough". If there's a hop flavor you are missing due to whirlpool length, odds are good you can compensate with some combination of whirlpool hops and dryhopping.
The additional cleaning burden is nothing to sneeze at, either.
Neighbors hose!
A pre chiller would do more good.. get your ground water colder, and there is no cleaning/sanitation considerations.
Neighbors hose!
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