How to make a wort chiller for homebrewing

Step 5 Connecting to the ball valve

On the inside of the cooler will be a coupling that the copper coil will attach to. Take the 3/8" compression fitting with the male end and remove the nut and compression ring. Screw the fitting into the coupling and tighten with a wrench.

Now, connect the copper coil. Slide the nut and compression ring over the tube and re-connect it to the compression fitting. Snug with a wrench.