Every year after an extended cruise, I stop at the pump out. Hook up the 
suction hose, open the clean out and spray water in the tank while sucking out 
the tank. This helps keep the odor down, especially being a live aboard. 
    Doug MountjoysvPegasusLF38 #4just west of Ballard, WA.    




------ Original message------From: Syerdave--- via CnC-ListDate: Sun, Aug 14, 
2016 16:46To: C&c Stus List;Cc: syerd...@gmail.com;Subject:Stus-List (no 
subject)
Thanks Paul, you've  got me thinking....I know the vent works because the guy 
who did the last pump out commented that he liked the location because he could 
hear the vent.   So, it is admitting some air, but day in day out, not a lot 
because it can't circulate.  Any reason you can think of not to create a vented 
deck fill?  Big boats have big vents...  Same thing, I would  think.This may 
not solve the stench-permeated tank issue, but it would air the tank.
Dave.

From: Dreuge <dre...@gmail.com>
To: CnClist <cnc-list@cnc-list.com>
Subject: Re: Stus-List Guidance required on Sewage hose type - LF38
   NOW    Active holding tank vent
Message-ID: <47519851-9d14-4693-b61f-cc574a8f1...@gmail.com>
Content-Type: text/plain; charset=us-ascii


Dave,

>From what all the experts say, using quality hose and having proper 
>ventilation are main keys.   A real eye opener for me was finding 
a bug nest clogged air vent line, so at the very least check or replace your 
vent line.   To be honest, I cannot make any claims that adding the
active ventilation fixed any problems as the system was be newly installed so 
there was no problem to fix.  But at such a small
cost ~$25, it was a no brainer to install a system which constantly  pumps 
fresh air into the holding tank.   I thought briefly about getting a 
12V air pump, but  if I were to make any changes it would be to plumb the 
galley sink drain to the head inlet so that when I leave the boat for an 
extended period, 
the head inlet could easily be flush with fresh water.   This eliminate salt 
water organisms from the inlet line which die off in 
the line and decay, without oxygen, anaerobically. 


-
Paul E.
1981 C&C 38 Landfall 
S/V Johanna Rose
Carrabelle, FL

http://svjohannarose.blogspot.com/

On Aug 14, 2016, at 11:01 AM, cnc-list-requ...@cnc-list.com wrote:

Message: 1
Date: Sun, 14 Aug 2016 08:32:27 -0400
From: Dave Syer <syerd...@gmail.com>
To: "dre...@gmail.com" <dre...@gmail.com>,    C&c Stus List
   <cnc-list@cnc-list.com>
Subject: Re: Stus-List Guidance required on Sewage hose type - LF38
   NOW Active holding tank vent


Paul ? great blog, lotsa detail.   You have piqued my curiosity with your 
active holding tank vent project.   I have a rather ?piquant? poly holding tank 
in my 33-2.  I changed the in and out (but not the vent) hoses  and still I get 
a stench, particularly when the adjoining lockers are opened.   The tank itself 
was removed and repaired, and while out it could not be de-stinked by any means 
I attempted, bleach, etc.  Maybe there?s a way to deal with that, dunno.
Am considering replacing the tank, but would rather resolve the cause. (or do 
both, and make provision for better/active ventilation in the new tank)
In your post below, you seem pretty pleased with the result, any other 
insights?  Anything you would do differently?

Dave



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