I flush an oxygenater tablet into the holding tank every few weeks. That has completely eliminated the smell we once had from the holding tank.
Andy C&C 40 Peregrine Andrew Burton 61 W Narragansett Newport, RI USA 02840 http://sites.google.com/site/andrewburtonyachtservices/ +401 965-5260 > On Aug 14, 2016, at 18:17, Dreuge via CnC-List <cnc-list@cnc-list.com> wrote: > > > 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! _______________________________________________ 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!
