[dmjlambert]

More info: With the copper gasket I found it was not necessary to do the tightening and loosening and re-tightening procedure to get it to seal, and I have reused the same gasket a couple of times with no problem. If I get a hint of a leak or if the gasket looks scarred, then I use a new gasket. I don't know how to describe how tight the connection needs to be, because I didn't use a torque wrench. I don't think it needs to be very tight, just snug to the point I'm sure it won't vibrate loose.