By that I mean that there is the outter flange that is the escussion that mounts to the transom. Then inside there is a threaded inner female section that appears to only be a few threads deep at this point ( i beleive that it has broken down over time). Can I replace that? It there an improved system that I could use? The second reason I am suspect of that fitting is that when the hull was drained by the Bilge and hand pump I could visibly see that waer was flowing back in from the transom.