| 31. | The handyman ventures this opinion : the air bubbles might be caused by blocked or partially blocked vent pipe.
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| 32. | If you get a blockage, start looking for it where the horizontal drain exits from the vertical vent pipe.
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| 33. | Another fix is to extend the vent pipe vertically, outside, for about 2 feet, and put a cap on that.
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| 34. | Due to the lack of vent turbulence and vent pipe resonances, many prefer the sound of PRs to reflex ports.
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| 35. | A vent pipe and fan are used to draw the radon from under the sheet and vent it to the outdoors.
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| 36. | The principal mechanism of ventilation in VIP latrines is the action of wind blowing across the top of the vent pipe.
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| 37. | The gas generator vent pipe was also changed to point outward and away from the missile instead of directly underneath it.
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| 38. | A metal vent pipe rises from the roof ridge at the south, with additional pipes coming out of the western wall.
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| 39. | Unpleasant fecal odors from the pit contents are thus sucked up and exhausted out of vent pipe, leaving the superstructure odor-free.
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| 40. | However, if the latrine is dark inside, the only light they can see is at the top of the vent pipe.
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