I would like to hear how bid a deal it is to change the charcoal in the filter. One over flow of the tank = $85 for a new filter
09-23-2008 12:02 PM
I have had a similar problem in the past and was solved with a sealand filter. Also a treatment for the holding tank a few times helps alot with any build up in the tank that or course adds to the smell!! Basically this helps to give the holding tank a good clean out.
Not a strange thing to change pipes and still have the smell.....only to have a tank that needs a good clean - I learnt this by the second year I had been living on my boat.
What I have tried (and worked for me) is to put a lot of hot soapy water (liquid washing up detergent, a small amout!) through your toilet and pipes and a good soaking...basically a good cleanout of the pipes and tank.
Pump out - do it all again a few times if possible.
Add the sealand filter and if all piping is ok this will go a long way to solving your problem
09-19-2008 10:10 PM
The T-fitting and two vents will also help draw air out of the tank due to venturi effect of air flowing through the two vents... windward to leeward.
09-19-2008 08:42 PM
My fiancee just attended a seminar on marine plumbing during which the lecturer addressed your question. He suggested putting two vents, or a "T" in the vent fitting and running a vent outlet to each side of the boat. The laws of physics and wind will ensure that the smell comes out the leward vent and is carried away quickly.
Hope that helps.
09-19-2008 07:49 PM
The basic problem is not enough aerobic bacteria.
Try Home depot or another such store for HOME septic tank treatment.Add this to your holding tank and vent line.Worked for me.
09-19-2008 06:57 PM
I doubt the vent alone is going to be enough to get fresh air into the tank unless the hose run is REALLY short. There are systems on the market that supply a small flow of fresh air to the tank. That seems to me the only way to insure growth of aerobic bacteria.
09-19-2008 06:10 PM
Originally Posted by jbondy
How do you reverse flush the vent line? Do you just push a hose over the vent?
That is exactly what I do. I stick a chunk of vinyl tube over the end of the garden hose and stick it over the vent while pumping out. Seems to do the trick, but just make sure everything is hose clamped! That said, if you really got a good hookup there is a risk of pressuring the holding tank and other associated fittings not normally under pressure so be careful.
09-19-2008 04:53 PM
How do you reverse flush the vent line? Do you just push a hose over the vent? On Pokey, the vent itself is a screened doohickey that protrudes from the hull below the rub strake. We usually avail ourselves of a pumpout boat or pump overboard and are hardly ever at a dock. (We keep her on a mooring.) Just wondering. Thanks.
09-19-2008 03:58 PM
Originally Posted by sailingdog
Before doing any of that, it might be worth checking the existing vent line to see if it is clogged. Wasps and other bugs love to build in the vent lines. Also, if you've ever over filled the holding tank, it could have less desireable materials clogging it.
I have had this problem a lot. My tank is small, and the vent is right over the tapered end of the tank. Even if I didn't overfill that tank a spirited sail seems to be enough to clog the tube. I have made it a routine to reverse flush the vent line every time I pump out. This seems to be working so far... Use some old battery cable or similar stiff wire to clear any obstructions. Yummy...
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