[ILDiver]

I'm trying to remember what those plugs look like. Do they have a nut or screw on them? I'm wondering if it is a seal that gets smashed out to wedge to the barrel making the seal? (Imagine 2 washers with a block of rubber between them and a bolt through the middle)

So if you loosen the screw it relives pressure and allows the rubber to decompress. I'm guessing the seal is not seated correctly and there is a small gap allowing water in.

I would re-seat both ends to be sure the leak is fixed.