I noticed a leak coming from the valve between my main water supply and the pipe connected to washing machine's cold water intake. I looked online and saw 2 common solutions : tighten the packing nut , or replace the packing washer.
Now my problem is that I can't locate these parts on the valve I'm working with. I was able to remove the handle and expose what looks like the valve stem (based on a diagram I found online) , but the packing nut is what I'm having trouble finding.
You can see in the second picture where it's leaking from. The plastic cap is what the blue handle fits over, and is held in place by a screw.
I assumed the big nut right above the stem/screw (second picture) was the packing nut, but I can't seem to turn it at all, in either direction. I don't know if that indeed is the packing nut and it's simply stuck because of rust buildup or something, but I don't want to force it and break a soldered connection.
Can you guys help me figure out what I'm looking at here ?