I just got some ball valves from buyfittingsonline.com and they are really really tight to turn. So tight I am afraid that if I try and use them on my kettle it will cause problems with my weldless fitting.
Does anyone have any suggestions as to what might be done to loosen them?
I had the same problem. Took them apart and put a very small amount of keg lube and worked them back and forth. They loosened up a bit and after using them with heat they were fine. In my case the most expensive ones I bought were the hardest to turn.