[quote=FlyerInHi]
Why get a threaded valve?Just get the solder kind. So much easier, and you have more room for adjustment. I never replaced a regulator…do they all have threaded connections? I know that you want future serviceability but once you learn how to solder, that is the serviceability.[/quote]The internal seals and diaphragms of a regulator do not like the type of heat you solder with. The unions make it easier to replace – since it is much more likely to fail than a copper pipe. The threads are brass, so they are less likely to corrode.