I am in the process of a Master Bedroom makeover, which includes a paint job, new hardwood floors, and a closet organizing unit.
When I removed the carpet and baseboards in the Master Closet, I found this "coupler" on a section of copper pipe. It has a small leak. As you can see from the photo below, it has a threaded connection on one side and is soldered on the other.
I'm looking for some professional advice on what to do. I could just remove it and replace it with copper pipe. I believe there is enough "play" in the pipe.
Should I try tightening the threaded connection?
Or should I call a professional plumber in to make the repair?
I'm pretty handy and am not afraid to solder, I just don't know what this is or what to do to repair the leak.