A counter flow wort chiller chills wort that is circulating in an inner tube while cold water circulates in the opposite direction in an outer surrounding tube. This model is convulted, which means the 12' of inner thin wall ½" outer diameter stainless tubing is twisted to increase the surface area exposed to the outer cooling water. This increases efficiency and speed of cooling. Stainless steel is more durable and stainproof than copper, although copper has a slight edge on heat transfer. Important - for best results, your tap water should be 60 F. or less.
Unlike a simple immersion chiller, a counter flow chiller needs to be rinsed thoroughly between uses to keep it clean. A thorough flush with water immediately after use keeps it clean for the next batch. The wort in and out tubes feature 1/2" FPT brass threads for easy attachment of male NPT 1/2" threaded fittings. Keep in mind that brass is softer than stainless, so if you screw stainless parts into these fittings, do not over tighten, as excessive force can crack the softer brass.
The water in tube is a male hose thread fitting on one end, and female hose thread on the other end. Be sure to set it up so the wort is running the opposite direction of the outer cooling water. 10" long, with a 6" diameter outer coil. A mounting bracket is welded to one end so this can be mounted in a variety of positions.
Click on the more info link above for another picture of this unit.
This shows another view including the mounting bracket. Note the 1/2" FPT wort in and out fittings, for easy attachment of ball lock and snap lock quick connectors. Or, use a 1/2" stainless pipe thread nipple, and install a ball valve on the wort in or out for better cooling regulation. The ball valve will allow you to throttle down the wort flow to compensate for warmer tap water temperatures while cooling.
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