Replace head thru-hull fittings
From MITNA
DISCUSSION:
Observed outside, the hull material around the two thru-hulls for the head appear to need re-glassing. In addition, the head output (effluent) thru-hull was leaking inside the hull in 2007.
Note that the head's raw-water input thru-hull is shared with the sink's output water.
TODO: continue write-up, after uploading pictures of the 2 thru-hulls, etc.