[C320-list] Holding Tank Vent

[Jane & Ken]

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