I don't have the proper special wrench for these, so I used a pipe wrench. They are about as tight as I can get them when holding the faucet portion in my hand while turning. I noticed there is still plenty of thread left, and I was thinking in order to get a proper seal this would have to be 100% seated. However if I am wrong and I really crank down on it I could damage it so I wanted a opinion on it. Here is what it looks like right now.