[C320-list] Head Vent

[Henderson, David]

Jim, A tip for you and anyone attempting this project.  I did it last
spring and have had that same positive results that Jeff and others
report.  However, my hull #1049 is I believe a couple of hundred hulls
after Jeff's, and consequently I found a structural difference that
presented a key complication. The factory vent goes through my hull at a
point where there is only about two inches of space between the inside
of the hull and an interior structural element which I think is just
part of the head forward bulkhead.  The factory vent does a 90 degree
bend so it just fit into that tight space; but after I got the medicine
cabinet out and played with it, I discovered that there was no way that
I could get a new marleon thru hull with hose attached into that same
space.  The barb of the thru hull sticks straight out for about two
inches or so and there just wasn't enough room to get the hose onto it
-  even if I tried to shorten the barb.  Not even close.  And I could
not find a thru hull with a 90 degree bend anywhere.  So, the solution,
although far from ideal, was to leave the factory vent in place and
simply plug it permanently with some silicone caulk.  I then installed
the new thru hull about four or five inches aft of the existing vent,
where there was no structural element in the way. 

So now I have two holes in my starboard side, one occupied by the dead
factory vent.  I was not happy about this result at first, but it really
doesn't look odd, and I am sure I am the only one who would ever notice.
Most importantly, as I said above, the head odor is completely gone.

In retrospect, I'll bet that the factory vent on Jeff's boat was
installed further aft than mine, and that's why he didn't encounter this
issue. 

Good luck,

Dave Henderson

Dottie B.  # 1049 (for sale  -  see listing on Yachtworld:
http://www.yachtworld.com/boats/2005/Catalina-320-2489149/Manchester/MA/
United-States) 



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Message: 1
Date: Wed, 17 Oct 2012 15:32:42 -0400
From: Jeff Hare <catalina at thehares.com>
To: "C320-List at Catalina320.com" <C320-List at Catalina320.com>
Subject: Re: [C320-list] Head vent
Message-ID: <EA4650BF-9D5D-4D86-BD34-5C3DBD9E46F6 at thehares.com>
Content-Type: text/plain;	charset=us-ascii

No, the holding tank already has the correct fitting.  The size of hose
used there is fine.  The factory vent takes a much smaller hose and that
is part of the problem.  Be sure to use a little silicone around the new
vent to ensure that no gasses can sneak back in around the new vent.

Zero holding tank smell all season this year.  Aft closet is back to
fiberglass and cedar smell again.  No complaints from the boss at all
this year. :)

Jeff

On Oct 17, 2012, at 10:03 AM, jim brown <jbrown5093 at yahoo.com> wrote:

> Sorry to bring this up again but I can't find Jeff Hare's nice piece
on replacing the head vent on the website. I know the parts needed for
the hose and the thru hull fitting but can't remember if the fitting on
the holding tank has to be replaced with a larger diameter one or not.
Can anyone point me in the right direction or supply a part number for
that piece if needed? Thanks. Should make a good early winter project
and allow me to practice my Navy language. 
> 
> 
> Jim Brown
> 
> 
> 
> 
> ________________________________


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Message: 2
Date: Wed, 17 Oct 2012 15:34:08 -0400
From: William <wmo48 at yahoo.com>
To: "C320-List at Catalina320.com" <C320-List at Catalina320.com>
Subject: Re: [C320-list] Head vent
Message-ID: <DEED707C-4421-4F62-A20A-BEC2FB6C6D9F at yahoo.com>
Content-Type: text/plain;	charset=us-ascii

I used the same diameter hose and did not replace the holding tank
fitting.
Mike Ott
'AmandaLu'
#508

Sent from my iPhone