[C320-list] head thru hull

[bruceheyman at cox.net]

Darrell,
Haven't done either of these jobs on this boat but have on others.  I would recommend that if you only have a couple hours in the sling make sure you have three valves with you.  The one you think it is and one larger and one smaller.  That way you can stop good old Murphy in his tracks.

The hose you see going up behind the medicine cabinet is a vented loop.  It is a good idea and something I would keep.  It should go between the head pump and the bowl.
Bruce
Somerset 671 SoCal
Sent via BlackBerry from Cingular Wireless  

-----Original Message-----
From: "Darrell" <dgray at n-sea.org>
Date: Mon, 8 Jan 2007 06:51:58 
To:"C320-List" <c320-list at catalina320.org>
Subject: [C320-list] head thru hull

I have a 1994 C320 hull # 88. For the past few years, my direct overboard 
thru hull valve for the head , has got harder and harder to turn to the 
point you are pretty sure you are going to break the handle off, I have 
tried lubing it on 2 occasions when I have had the boat out of the water 
with little result. This year I just plan to lift the boat and pressure wash 
it while it the slings, replace zincs and drop it right back in the water. I 
thought I would also replace this valve. Using a tape measure and a flash 
light, the outside diameter of the thru hull tread appears to be about 2 
inches. I am assuming the thru hull diameter is 1 1/2 : like the rest of the 
head plumbing. When I went to west marine to by a replacement valve they 
were also certain it was a 1/1/2 " thru hull so I bought a 1 1/2" marlon 
valve that has a female thread of just under 2 ". Because I only have a few 
hours in the sling, I would like to confirm with any other owners that may 
have replaced this valve that I  have the right part. Any help would be 
greatly appreciated. On another note, I am just replacing  all my head hoses 
and must say I am not to impressed with the original Catalina installation, 
with one elbow and a different y valve, I was able to eliminate about 5 feet 
of 1 1/2 hose. Also the vent hose fitting on the holding tank is 3/4, while 
the actual vent is 1/2 inch. I am also replacing the head as the pump has a 
small crack and is leaking. The new head has a hose going directly from the 
top of the pump to the back of the bowl. My original toilet has as hose 
leaving the top of the pump going through the wall behind the head and 
another one returning to the back of the bowl. At first I thought this was 
just a big loop, but while scratching my arms all up on the rough fiberglass 
behind the cabinet it appears this isn't the case. I am planning to remove 
the toilet paper holder so I might see what is going on back there better. 
Again if anyone who has encountered this could enlighten me as to what is 
going on back there , I would greatly appreciate it. Don't get me wrong, I 
love the boat , I am just tired of coming home itchy and smelling like crap, 
Darrell