The Active Aqua chiller comes with a set of fittings that get you to 3/4" tubing, and another for 1/2" tubing. The main reason people might avoid these fittings is that they are notoriously prone to leaking.
I did two things to avoid issues:
1. Take apart the fittings and inspect the tube where the rubber seal seats. If there is a ridge, shave it down with a sharp knife for a file.
2. Coat the rubber seal with Vaseline and reassemble. This will help the seal seat properly when you tighten it.
When I put my setup together, I hand tightened these fittings. One dripped slightly, so I tightened it a little more with a strap wrench until it stopped.
Hopefully this helps someone avoid a leak!
Brian
