Putting together more plumbing to get the addition warm. I pressure tested a good portion of my work (the indoor portion) and no leaks in any of my joints.....but the ball valves were leaking! A handful were leaking around the "stem", the actuator of the valve, so tightening up that nut and leak is gone. But, I also had two (one a Webstone isolation valve) that was leaking air at the joint where the valve goes together. I tried to tighten this up, but it didn't help. So what gives? Do valves often leak here? I have about 16 valves that I put in, and two of them have that vavle body connection leaking.....and have to cut them out and replace?! Do these things leak if they were "wet" with water? I don't know what the seal is in there.....but very disappointing to have to cut it out and replace! Thanks!