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 Message: 4 Date: Sat, 13 Aug 2016 19:34:25 -0400 From: Dreuge <dre...@gmail.com> To: cnc-list@cnc-list.com Subject: Re: Stus-List Guidance required on Sewage hose type - LF38 Hi John, I have recently gone through much of this with my LF38, and I have written much of this up on my blog. The first link below discusses the head plumbing. I went with a macerator pump rather than a hand pump. Read the section on my ?Sanitation System Plan?. In my setup, all head waste goes directly to the holding tank. The holding tank is emptied via a Y-valve either at the deck outlet or via a macerator discharged overboard below the waterline. The key here is All of the waste is pumped into a holding tank. When there's no Y?valve between the toilet and tank there is no legal requirement to lock a valve or seacock. On the other hand, installing a Y-valve between the head and the holding tank makes one legally required to lock/restrain the Y-valve closed when inside the three-mile limit. Not having a Y-valve before the holding tank gives authorities no reason to get upset. Also, I have added an affordable (~$20) active ventilation system to the holding tank(see second link). It's been in use for nearly a year now, and so far with plenty of use there are absolutely no bad smells in the head. Lastly, I have added a link to my LF38 projects page. Resurrecting the Marine Head http://svjohannarose.blogspot.com/search/label/HeadPlumbingWork <http://svjohannarose.blogspot.com/search/label/HeadPlumbingWork> Adding Active Ventilation to the Holding Tank http://svjohannarose.blogspot.com/search/label/ActiveVentHoldingTank <http://svjohannarose.blogspot.com/search/label/ActiveVentHoldingTank> List of Projects http://svjohannarose.blogspot.com/p/projects.html <http://svjohannarose.blogspot.com/p/projects.html> - Paul E. 1981 C&C 38 Landfall S/V Johanna Rose Carrabelle, FL _______________________________________________ This list is supported by the generous donations of our members. If you like what we do, please help us pay for our costs by donating. All Contributions are greatly appreciated!
