This section of pipe is the incoming main to the house. I believe it's PEX but need confirmation. It transitions here to copper throughout the rest of the house. Anyway I replaced inline the PRV right above this section today and this pipe section swiveled/rotated a bit back and forth in place on that 90 degree elbow pex fitting. BTW if I'm stating anything incorrectly please let me know.
Anyway I have a very, very small drip it appears where I'm pointing. That appears to be a really old compression fitting on the pex? coming in from the wall.
1st off am I correct in my assessment of the parts and if I disassemble this can I remove the compression fitting and install a new one? I believe the one on there is aging and when I rotated the pipe just a tad during the PRV install it loosened it just enough to be a small problem.
I'd need to know what tool to use to remove the old fitting, and reinstall compressed. I really don't want to pay the highway robbery prices around here for repair, and would do same-same to what's pictured. I also have the key to turn the water off at the street before repair. Thanks!
EDIT: I found the specific compression part; appears to be a SharkBite PEX clamp: https://www.lowes.com/pd/SharkBite-10-Pack-1-2-in-dia-Stainless-Steel-PEX-Pinch-Clamp-Crimp-Fitting/1000182819
SOLUTION: Adding as it might help someone. The answer led me in the right direction. At 1st I cut away the vertical PEX, cut a new piece, got a new male 3/4" adapter to replace the worn one on top, and added new copper crimp rings. It looked awesome, but leaked. There was a lurking problem. The original elbow at the bottom after removing the vertical PEX piece revealed it had been badly scored by a knife by a previous 'plumber.' This setup was waiting to leak. The problem with the copper rings is you have to cut off a generous piece of PEX and use a special cutting tool. The PEX crimp stainless clamps are easier to remove in place. Since I had to cut away PEX coming from the wall to remove the damaged elbow, I had no forgiveness in my next setup. I had Sharkbite connectors as plan B, but still wanted to use crimp clamps. I bought the other PEX crimp tool from Lowe's and the stainless steel clamps. This way if I clamped the new elbow and for whatever reason there was a leak, I could cut away the clamp in place, remove the elbow and go with plan B to use Sharkbite (would not be able to do this with a copper ring). However my plan A worked and the new elbow and crimp clamps worked like a charm. I also have both tools and sets of clamps for the future for less than paying for a repair person. No leaks and working great!