Subscriber Exclusive

How to Chill Wort with a Pond Pump

Here's a nifty way to cool your wort to 65°F (18°C) in the summer when the tap water is considerably warmer.

Dave Carpenter May 30, 2017 - 3 min read

How to Chill Wort with a Pond Pump Primary Image

Most of us cool our wort using a chiller that relies on water as the working fluid. Tap water goes in one end, heat is transferred through a metal wall from the wort to the water, and hot water comes out the other side. Whether you use a coiled immersion chiller, a plate chiller, or a counterflow chiller, the heat transfer principles are the same.

These devices work beautifully in the winter, when tap water can run as low as 40–50°F (4–10°C) in some locations. But in summer, tap water is often warmer than your desired pitching temperature. How can you cool your wort to 65°F (18°C) with tap water that may be considerably warmer?

Enter the humble pond pump. Available at garden centers and home improvement stores for less than $20, a garden pump might become your best friend in the summer. Submerged in a cooler of ice water, a pond pump can deliver much colder cooling water than your household spigots.

Make & Drink Better Beer

Subscribe today to access all of the premium brewing content available (including this article). With thousands of reviews, our subscribers call it "the perfect beer magazine" and "worth every penny." Your subscription is protected by a 100% money back guarantee.