Anyway, the leak is from the BOTTOM of the connection, so if I want to fx this without cutting pipe and dismantling everything all over again, the solder would have to suck upwards into the joint. So my questions are:
1) with a cutoff valve being right above where this leak is, can I assume that shutting it off and draining the water heater a little bit will give me a water-free inside of the pipe at that point so I can successfully heat up the pipe enough for solder?
2) Assuming "yes" to the above, will solder flow upwards into this joint, "sucked" up by the heat?
Thanks for any input here, I'm a floundering newbie. I appreciate your time.