Dave,

not a specific solution to any of your problems, but if you are dealing with 
sanitation, Peggy Hall’s book (Get Rid of Boat Odors) is a very good read. It 
might be the best $25 you spend on your sanitation systems (A Kindle version is 
I think under $10).

Marek

From: Danny Haughey via CnC-List 
Sent: Monday, August 15, 2016 09:36
To: cnc-list@cnc-list.com 
Cc: Danny Haughey 
Subject: Re: Stus-List (no subject)

HI Dave,

Not for nuthin' but, if you can hear the the vent, it is restricted and won't 
be letting much air in unless there is a vacuum like the one created by the 
pump. Mine was the same way when I bought my boat so I added a second and 
enlarged the first using 1-1/8 SS thru hull fittings and hose. was not that big 
a job. also the waste hose could be a big source of smells from the system. I 
replaced all those as well. no oder at all on our boat!

The larger vents and thru hull also allow me to flush the system at pumpout 
with fresh water running into the system through the vent opening and get the 
tank nice and clean.

Danny




On 8/14/2016 7:45 PM, Syerdave--- via CnC-List wrote:

  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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