I didn't realize this was an option. If you don't mind, could you show me a picture of your stainless steel hose / siphon?
But to be perfectly honest, since my original post I've started to think about what type of connection is the best type of connection? So what qualifies a connection as being "the best"? I'd have to say something that makes ball valve replacement easy, no leaks, and is easy to clean.
From what I understand, there are Quick Disconnect fittings, Tri-Clover fittings, Camlock fittings, and Blichmann NPT fittings. I want to connect this to a counterflow chiller, so what I need to find out is which connection fitting will best suit my needs.
Ignoring cost, a welded port with TC fittings would be the easiest to clean and the least likely to leak. That would likely be the most expensive, because of the TC fittings, although I am not familiar with the cost of the Blichmann fittings. I wouldn't necessarily recommend that for your pot, as you may transition out of that setup. A welded port will cost for the welding and the ferrule. Weldless will require a step bit or a knockout punch to make the hole plus a bulkhead. It's kind of a wash between welded and not if you don't have the step bit or the knockout punch. If you pay to have it welded putting the hole in is part of the cost. QDs and camlocks are close in price, but TC fittings are more than both.
I have all weldless fittings on my 3 vessel system, somewhere around 10 ports without checking. Sometimes a little adjustment is necessary depending on the configuration and use. This is mainly because I have used what I had available from various used purchases at times.
I prefer the QDs myself over camlocks for ease of use and I haven't used the Blichmann products. Three piece ball valves are easier to get apart in my opinion vs the two piece as the two piece style requires a larger box end wrench which I don't even own. Which translates to using an adjustable or channel locks and that tends to mar the surface. If your ball valve is not TC, (where maybe a butterfly valve is potentially better), the valve will use NPT threads. A three piece is easier to align as the valve can be oriented much easier vs getting the thread tightness just right on the two piece so the valve handle is where you want it when tightening.
Connecting to your counterflow chiller is independent from the valve. The CFC will have some kind of fittings on the beer line. You will need to put a fitting on that which connects to the tubing and then the tubing connects to the valve on the pot. Most setups I've seen don't connect the CFC directly to the boil kettle. You could pipe it but that still is independent, BK valve to pipe, pipe to CFC.
On your original post, that setup has a barb coming off the valve. That will firmly mount your tubing there but I'd recommend a disconnect of some kind instead of the barb.