Sometimes it is what Peggie says, sometimes it is an anaerobic problem like what Extemporaneous shared. My boat's holding tank
smelled so bad that flushing
was life-threatening ... not good since I live aboard. My boat had a single
0.5" vent on the tank, and once I learned that is not enough ventilation to prevent an anaerobic environment
I hoped to schedule new tank vents for the day or two after I died, which probably would have been pretty soon if I didn't get a Round Tuit last month.
Fortunately, new vents made it to the top of The List three weeks ago, and my tank became ODOR
FREE THAT DAY.
First, thoroughly check out anything Peggie has to say and try that. If you still have the smell then it is probably due to the waste living in an anaerobic environment
and you will need to add an additional vent to your tank, and/or possibly also enlarge the existing tank vent. This is not fun, and not easy, or cheap
if you do not do your own work.
On my tank I installed two 5/8" vents, one port and one stbd, to get some cross ventilation, and glassed over the old 1/2" vent. It was a little complicated because my boat has a fiberglass
tank and I used threaded Marelon hose fittings with a 3/8"-thick piece of PVC with an embedded PVC coupling as the go-between (praise West System Tech Support
). But really, the only bad part was the smell from drilling the two new holes into the holding tank
and cutting off the old fitting. WEAR A GOOD RESPIRATOR and do this on a day every window and hatch
can be open.
For tank treatment, as an Environmental Scientist in my previous life I do not support the approval from the Men
In White Coats who claim Better Living Through Chemistry. Excrement is natural and if natural ways of breaking it down had not evolved along with it we would be awash with excrement instead of water
for our boats. Whether you pump-out at a marina or pump-out at sea, Earth is our home, please be kind and thoughtful about what you discharge from your boat - or house. Remember the adage, "you can't throw anything away, it just goes someplace else," and in the end that "someplace else" is usually our water
. Be aware, sewage treatment plants do not remove many chemicals, and their "treated" effluent gets discharged in our rivers and oceans. To get my tank biologically "happy" I tried the 100%biodegradable enzyme CAMCO RV Toilet Treatment Drop-INS. In the USA these are available at Wal-Mart, or try www.camco.net
Do question Peggie for advice first, she is an expert in her field and much more pleasant than adding new tank vents.
However, I Strongly disagree with T-ing intakes into drains - things go out drains that you do not want to bring back into boat systems. Keep intakes separate from the drains, inside and outside the vessel. If I surveyed a boat and found an intake on a drain, or an intake too close to a drain, I would write it up in the findings.
Bazzer and silversailor - I am not familiar with the Jabso head
, but compared to my boat's Raritan
head, it sounds like the o-rings on your pumps may have torn/broken. Sad but true, I named my head Caesar because of the regular vinegar and mineral oil
treatments it needs to function properly.