Is the elbow coming out of the bottom removable? Mine sprung a leak and I tried to fix it with an epoxy sealant which didn't work. I couldn't tell if the elbow was screwed on or not due to the paint.
If you can see a thread, it is screwed on. If not, then probably not. But the bigger question is WHY it is leaking. ANY connection would seldom just "start leaking" by itself.