[C320-list] Holding Tank Vent

[Irving Grunes]

Jeff,
If you sail with the rail down in the water, won't this fill the waste tank
since there is no check-valve.
Irv Grunes
2001 Isle of Wight

On Fri, Apr 6, 2012 at 2:58 PM, Jeff Hare <Catalina at thehares.com> wrote:

> 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
>
>