"Mike C" wrote in message
oups.com...
I don't know where the intake for my head is...but am wondering if that
could be the problem. Since they didn't winterize my boat properly...I
am thinking that could be it. I am not sure where that intake is
though. Didn't see it when I removed the fridge which is next to the
head and where the shower drain, a/c, etc are.


If you draw raw vs. fresh water the intake and through hull is most likely
in the engine compartment bilge area. It could also be midship with an
access panel in the floor to service it.