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Old 14-07-2010, 09:04   #16
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My vote is to run a new hose, it shouldn't be *that* hard.
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Old 14-07-2010, 09:05   #17
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I saw the photo of the vent itself, I just haven't recognized anything like that on my deck. I thought maybe there was often something else around it. I didn't think it would just be sticking straight through.

I'll have to look again this weekend.
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Old 14-07-2010, 09:51   #18
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Had a clogged vent hose. I disconnected it and ran a plumber's snake thru the hose into the tank. Solved the problem.
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Old 14-07-2010, 11:16   #19
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I saw the photo of the vent itself, I just haven't recognized anything like that on my deck. I thought maybe there was often something else around it. I didn't think it would just be sticking straight through.

I'll have to look again this weekend.
I wouldn't expect it to be on the deck, I would expect it to be on the outside of the hull as close to the holding tank as possible.

Any tank must have a vent. Fuel, water, waste, grey water (some boats). You can't put liquid in a tank without letting air out and you can't take liquid out of a tank without letting air in to take its place.

If you have a fuel tank, a water tank, and a holding (sewage) tank, there will be at least three vents.

If nothing else, you can identify the holding tank vent by the smell.
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Old 14-07-2010, 11:17   #20
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Had a clogged vent hose. I disconnected it and ran a plumber's snake thru the hose into the tank. Solved the problem.
That will work if you don't have a filter. It won't work if you do have a filter. I am not a big fan of vent filters.
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Old 14-07-2010, 19:55   #21
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If it is a buggy thing that has clogged the screen in the vent. Need quick compressed air? Take your "horn in a can" and put the vent hose down the "trumpet end". When you push the button to activate the horn, it will blow out the blockage, the sound will be muted by the hose end.
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Old 14-07-2010, 20:44   #22
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Not sure where your "filter" is, mine has a screen in the through-hull fitting. The screen mesh is pretty fine and it gets gunked up, very likely if you overflow and the smelly stuff gets into it. I replaced the fitting. Now when I pump out I direct a fresh water stream into the vent so it draws water in and cleans the screen from the outside. Haven't had a repeat of the problem.
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Old 14-07-2010, 20:50   #23
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If u have a filter a blast of water will kill it search online with a few $ of plastic pvc and charcoal from the pet store one can refill a used filter for a few bucks Also check the fitting into the tank and elbow can clog easy
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Old 15-07-2010, 08:00   #24
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Not sure where your "filter" is, mine has a screen in the through-hull fitting. The screen mesh is pretty fine and it gets gunked up, very likely if you overflow and the smelly stuff gets into it. I replaced the fitting. Now when I pump out I direct a fresh water stream into the vent so it draws water in and cleans the screen from the outside. Haven't had a repeat of the problem.
There may be a "filter", which is a piece of hose or pipe filled with charcoal and/or there may be a screen on the thru hull fitting. The screen is not needed and can be removed and discarded.

There are differing opinions on the need for a filter. I believe it restricts air movement and air is needed in the tank to controll bacteria, especially if a "natural" product is being used as a treatment.
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Old 15-07-2010, 08:28   #25
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You might try something like Cen-tech wire running poles to clear the line.
THE BIANKA LOG BLOG: A DIFFERENT KIND OF FISHING
They screw together are quite flexible (more than the Geenlee ones). I would tape the joints with a good strong tape so they don't unscrew just to be sure. I've used them to knock out barnacles that tried to homestead in my through hulls.

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Old 15-07-2010, 09:15   #26
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Should I try and clear with compressed air?? Thoughts and or experience would be appreciated!
Take your boat immediately to the closest marina and tell the service person to fix it whilst you book into the local 5 star resort.

Refuse to come back till this dirty, smelly man says its fixed.



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P.S. I normally charge for this sort of advice.
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