This valve is leaking from the area shown.
I tried unscrewing the valve but it wouldn't budge. The pipe it's connected to is 60 years old, so I need to be gentle. What's the safest way to take it off?
Option B is to change the stem. Most valves I've seen have a single nut that holds the stem in, but this one has two. Tightening the second nut shown by the arrow eliminated the leak but then the handle won't turn at all.
Which stem do I need to replace the one I have?