View source for Replace head thru-hull fittings

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.
  
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Photo 1 below shows the relative locations of the two thru-hulls on port underwater. 
The upper right thru-hull is the head output (effluent) thruhull, while the lower left one is the head's raw-water input thru-hull.

[[IMAGE:Head_thruhullsP1090840-5x3p72.jpg]] 

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Photo 2 below shows the output thruhull as viewed from a bit aft.
[[IMAGE:Head_outlet-P1090845-5x5p96q6.jpg]].
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Above, we've chosen to show the gap between the flange of the thruhull and the hull.  We don't know whether this is the place that is leaking.
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Photo 3 below shows the same output thruhull, but from a little bit forward.  An experienced eye is needed to opine whether the glass is separating in the inside of the flange.

[[IMAGE:Head_out-P1090850-5x5p96-fwd.jpg]]

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Photo 4 below shows the other thruhull, i.e., the head raw-water-input thruhull.
[[IMAGE:Head in-P1090851-8x7p96.jpg]]

We don't know of any leaking by this thruhull.  However, the hull surface appears to have been patched very badly, and an experienced eye should determine whether this surface is dangerous.


== Status: Jun 26, 2008 ==

* '''Head intake thruhull''':  The poor patching has been removed.  Epoxy w/ cavasil has been plastered over the thruhull fitting.  This has been sanded and painted.  It looks much better.

* '''Head outflow thruhull''': The old thruhull has been removed.  Leaking was evident between the thruhull and the hull of the boat.  The hole has been sanded and prepped.  A new thruhull, a valve, and a hose fitting have been procured and they are ready to be installed.  A backing plate has been fabricated out of a piece of 7/8" oak and has been coated with epoxy.