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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