I've added the tide pod-like packets, put some baking soda in the head sink. got a little better. opened the door under the sink today and nearly puked. everything looks tight and dry. please, please help.
Several possibilities: 1. a leaking connection...2. permeated sanitation hoses...something else.
Is the odor confined to the head?
The odor seems to be emanating from the head. No where else in the boat.
Does it emanate from the toilet bowl, or does the source seem to be under the vanity?
Since putting the aqua-chem packets in the toilet is seems to not be coming from there. When I open the door under the vanity it seems pronounced. BTW, under the vanity is bone dry. Hoses are 6 years old. No signs of leaks or cracks.
If from the bowl, do you see black flecks in the bowl when you bring in flush water (they'd be coming out of the channel in the rim of the bowl)?
Doesn't seem to be from the bowl, no black flecks in the bowl.
You said putting some baking soda down the head sink helped a bit...is your toilet's flush water intake line teed into the sink drain line (Beneteau wouldn't have plumbed it that way, but it's a common owner mod-- a good one actually). If so, I'm wondering if the toilet could have pulled in some animal sea life that's died and decayed there.....
Had the boat been sitting for an extended period, either in or out of the water?
Yes, has been on the hard since the end of last season or maybe longer.
If there's a shower sump, is it dry?
There must be because there is a floor drain. I'm guessing it's dry.
Those are enough questions to start with...
--Peggie
Jason can confirm for his boat, but I double checked ours today (same make, model, and year) and they are Trident 102 for all the black water. Gray water (sink drain and shower sump) uses black unmarked hose with a shiny black outer liner. We're the original owners so that's how it came from the factory.No leaks or cracks in the plumbing doesn't rule out permeated hoses...some can permeate in less than a year. There should be markings on it that include the mfr's name and/or maybe a logo, "model" name and even some numbers. They repeat every few feet. If you aren't sure what any of the markings mean, post a photo of a section of the hose showing the markings.
Exactly the same with mine. See attached photos.Jason can confirm for his boat, but I double checked ours today (same make, model, and year) and they are Trident 102 for all the black water. Gray water (sink drain and shower sump) uses black unmarked hose with a shiny black outer liner. We're the original owners so that's how it came from the factory.
Jason,Is it possible that the stagnant water in the shower drain and the faucet hoses was the source? I've been leaving the vanity door open hoping the it just needed to air out.
Lastly does water that has somehow gone into the vanity drain into the bilge?
It's very possible that the sink--both head sink and galley sink-- and shower drain lines are t least one of the sources of your odor. And if any gray water (galley, bath and shower water) or ice box drain water drains into the bilge, that's another likely source, but if it is, it's not likely that the odor would be confined to the head.Is it possible that the stagnant water in the shower drain and the faucet hoses was the source? I've been leaving the vanity door open hoping the it just needed to air out.
I think we're getting closer now. The disintegrating pink antifreeze in the sump and hoses could've been the source of part of the problem. When our pump runs it tends to "burp" a little air backwards in between pump strokes. It's possible that that burping pushed some of the air back from the hoses up the sump. Now that you've purged all the bad antifreeze from there hopefully it will be better.Some more intel that might help. The smell in the head was generally better today. I noticed the the shower drain had non-tox pink antifreeze. I turned on the water pressure and ran some water out of the tap nozzle. It spurted and sputtered, the ran some grey water with dark flecks than ran clear. That water stank. Then I ran the clean water onto the shower floor and ran the pump to drain the shower. More stink. I ran some more and pumped some more. The shower drain is now clear, not pink. I'll report on the smell tomorrow or later in the week.
Any water that leaks under the vanity does run to the bilge. Water in the sink and shower drains should run right out the sink discharge thru hull. It sounds to me like you probably didn't have any foul water under the vanity, just what was in the hoses. The bad water in the hoses may have permeated the black drain lines and led to the smell under the vanity. Hopefully now that you've purged the bad water the smell will be better.Lastly does water that has somehow gone into the vanity drain into the bilge? Could it be the bilge? I would think if it were, then the small would be more ubiquitous.
The Beneteau 37 has a very small "sump" - really just about a 1/2" recess in the shower floor pan. The sump pump pulls from there into a discharge hose that is Tee'd into the sink drain. They discharge through an underwater thru hull.The sinks drain directly overboard....but what about the shower? On most sailboats the shower drains into a sump where it's pushed out an above-waterline thru-hull by a sump pump...an shower water in a sump can turn into a stinking primordial soup if the sump isn't cleaned regularly. Fortunately cleaning them is easy...in fact, keeping them clean just about the only job on a boat that doesn't require any manual labor: