deck drain issue

[jwclbi]

Hello, I have a 73 SF with the original deck height and have replaced the deck drain tubes a couple times. Well now one of them is leaking even after i recently removed some of the old 5200 and loaded the top and bottom with 5200 again and let it dry before launching. I know these are pretty simple repairs but am i missing something on why this is leaking. Pretty sure the brass tube is not cracked. Going to haul the boat out today, get a look and probably replace the tube. Thanks