I use the March 809-HS pump with a ball valve on the output and pump through the Shirron into my conical. I live in Brick and during late fall and winter, ground water temperature is perfect. In the summer, I will run the ground water through a 50ft. immersion chiller set in an ice water bath to drop the temp before it hits the Shirron.
24 hours in a day, 24 beers in a case, coincidence?
-- Stephen Wright