[C320-list] Holding Tank Vent

[Jeff Hare]

Hi Joe,  

Sorry about that!   They're here...

http://www.catalina320.com/mediagallery/album.php?aid=254

Also, you can just enter the word "vent" or "thruhull" or "holding tank" in
the search box at the top right corner of the website and it should produce
all the hits you need.

Cheers!
-Jeff

-----Original Message-----
From: c320-list-bounces at lists.catalina320.com
[mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Joseph R
Aberdale
Sent: Thursday, April 05, 2012 9:13 PM
To: C320-List at Catalina320.com
Subject: Re: [C320-list] Holding Tank Vent

Jeff,

I attempted to locate your photos of this project but cannot find them on
the website. Perhaps you can provide me with some direction.

Thank you.

Joe Aberdale
#908

On Apr 1, 2012, at 7:49 PM, Jeff Hare wrote:

> Hi Mike,
> 
> The holding tank vent from the factory is a 5/8" fuel vent and vents out
the side of the boat.  The hose leading to that is 3/4".  The factory used a
makeshift technique to adapt the 3/4" hose to the 5/8" fitting. Not only is
this prone to leak fumes, it isn't particularly waterproof.  If you have a
boat with the Black plastic vent, this is designed in a way that can
actually vent gasses back into the boat since no sealant is used on the
fitting.  On top of that the baffles or screens in the vent prevents the
tank from breathing.
> 
> Last summer I did a fairly simple project to replace the vent hose with a
quality hose and installed a 3/4" thru hull fitting similar to the bilge
pump outlet thru hull.  The result was instant and dramatic.  Went from
having holding tank smell in the head and aft cabin closet whenever the head
was flushed to zero smell inside or outside the boat.
> 
> This is (in my opinion) a must-do project.  Even though we flush with
fresh water, there was always a smell in the aft cabin closet.  That is
completely in the past now.  
> 
> There are pictures in my c320 website photo gallery of this project.  It
took me a few hours one evening after work to do.
> 
> Jeff Hare
> #809 Woodbine II
> 
> 
> 
> 
> On Mar 30, 2012, at 7:03 PM, Jane & Ken <obuoy4848 at sbcglobal.net> wrote:
> 
>> Mike,
>> On hull #219 (OBUOY) the tank vent is the one under the rub rail and 
>> no stantion vent is present.  The "old" catalina boats did use the 
>> stantion as a vent--bad stuff on deck when over full.  Ken
>> 
>> --- On Fri, 3/30/12, Mike Ott <wmo48 at yahoo.com> wrote:
>> 
>> 
>> From: Mike Ott <wmo48 at yahoo.com>
>> Subject: [C320-list] Holding Tank Vent
>> To: c320-list at catalina320.com
>> Date: Friday, March 30, 2012, 12:53 PM
>> 
>> 
>> According to my owners manual ('98), it shows the holding tank vent 
>> exiting into a deck stanchion.  The stanchion has a small hole (1/8" 
>> +/-) through which the tank vents.  I also have, what appears to be, 
>> an overflow vent located in the hull just below the holding tank pump out
deck-fitting.  Is this also acting a
>> vent for the holding tank ?   The reason for my question is the Feb '12
article 
>> in Practical Sailor that says holding tanks should have at least a
minimum 3/4" 
>> vent to have an effective bacterial reaction.  Now maybe in '98 this 
>> installation was acceptable but now ?  If my vent is only the 1/8" 
>> hole in a stanchion, maybe I should go back to using bucket.  Knowing 
>> our group, I'm sure someone out there can give me the poop on this 
>> fragrant issue (I know, pretty bad puns).
>> Mike Ott
>> 'Amanda Lu'
>> #508