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Old 30-04-2010, 17:48   #16
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CalebD, yea that would be bad news but 1" tank vent lines that are 24" in length and no filter are pretty tough to stop up...
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Old 30-04-2010, 17:49   #17
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I've owned and chartered many boats which have varied from notably stinky to no noticeable smell at all. My observation is that this has little do with the vent, and a lot to do with the hose used, any leaks, the tank and most importantly how quickly and thoroughly the sewage is washed out.
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Old 30-04-2010, 19:58   #18
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Originally Posted by Christian Van H View Post
What type of fitting did you use to add a line to the tank? Something with threads and a gasket I presume?
There was an extra pipe nipple on the top with a pvc cap on it. I replaced the cap with fittings I either put together or made I (sad that already I can't remember) that terminated in a hose barb.

Had there not been the extra nipple, I would have replaced the one elbow on top with a tee so I'd still be able to add a vent line . Wouldn't have helped circulating air in the tank near as much, but it would have solved the problem of fumes coming out the head.
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Old 30-04-2010, 20:53   #19
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I have been looking at this for a while,
I checked out the components of the GROCO Sweettank system online, it appears to be a small 12V air Pump with a pvc pipe and an air stone to make bubbles at the bottom of the tank. Look here: GROCO SWEETANK ODOR NEUTRALIZATION SYSTEM - Waste Holding Tanks by Discount Marine Supplies

I also found a this livewell aerator system which may do the job Marine Metal Products Power Bubbles : Cabela's

I''ll be trying it out this summer, my tank has a removeable inspection cover on the top which I can use to run the air line down to the bottom without making a new hole in the tank. The tank odor is not bad in my boat but when the wind is right (wrong) the vent can be smelled out side and enters through the door. I have read that per Peggy Hall no chemicals should be used in the tank as they kill the "good" bacteria.
Will yeasts live in salt water, or a holding tank recieving salt water flushed waste?
Steve
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Old 03-08-2010, 17:37   #20
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Quote:
Originally Posted by stevensc View Post
I have been looking at this for a while,
I checked out the components of the GROCO Sweettank system online, it appears to be a small 12V air Pump with a pvc pipe and an air stone to make bubbles at the bottom of the tank. Look here: GROCO SWEETANK ODOR NEUTRALIZATION SYSTEM - Waste Holding Tanks by Discount Marine Supplies

I also found a this livewell aerator system which may do the job Marine Metal Products Power Bubbles : Cabela's

I''ll be trying it out this summer, my tank has a removeable inspection cover on the top which I can use to run the air line down to the bottom without making a new hole in the tank. The tank odor is not bad in my boat but when the wind is right (wrong) the vent can be smelled out side and enters through the door. I have read that per Peggy Hall no chemicals should be used in the tank as they kill the "good" bacteria.
Will yeasts live in salt water, or a holding tank recieving salt water flushed waste?
Steve

Steve---

Can you share with us how your system is working out???

Thanks--

Foggy
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Old 03-08-2010, 18:35   #21
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We should hold a design competition here on the forum to design a pump that aerates the holding tank using only the motion of the boat. Might be a problem in marinas though...
Nah, just encourage everyone to motor past making a big wake...
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Old 04-08-2010, 20:56   #22
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Most boats have their holding tank vents down "low" meaning not very far above the water. Ever wondered why houses have their vents on the roof? Suggest instead of air-ing out the tank, get the vent " up in ther air". We did this and lost our "boat fart".
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