Originally Posted by
Richard Rushing
I have to agree with Mike Schulz's assessment that since that vent stack is higher than the mushroom cap, It doesen't really pose a problem.
Actually, it poses just as great a problem being that high above as being that far below.
The sewer gases vent out, not just 'up', but 'out' ... in all directions, including falling back down.
Now, if the vent stack were 2 feet higher, I would agree, it would not be a problem, but then again, it would also not be a code issue if it were 2' higher either.
Wonder if there is a reason for that?
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P3103.5 Location of vent terminal. An open vent terminal from a drainage system shall not be located less than 4 feet (1219 mm) directly beneath any door, openable window, or other air intake opening of the building or of an adjacent building, nor shall any such vent terminal be within 10 feet (3048 mm) horizontally of such an opening unless it is at least 2 feet (610 mm) above the top of such opening.
That exhaust fan *IS* an intake opening. Especially, as has been aptly pointed out, once the motor burns out - because then it can no longer be an exhaust at any time, it's just an opening allowing for the free movement of air through it, both in and out.
I find it interesting that some of us grab onto some code sections but dismiss others ... guess it's because they know more than all the minds which went into writing the code?
