Does a Sump Pump Have to be Vented?

I am in the process of finishing my basement. I have a sump pump in one corner with a discharge pipe (going to the storm drain). There is also a vent pipe which is simply a run of open PVC going from the sump pit to the outside. If I put my hand over the vent pipe, there is positive pressure (i.e., cold air is coming in from outside).
The sump pump pit will actually be on the inside of a finished room with a removable platform over the top (serving as an end table). [Note: This has already passed inspection].
I noticed today, that the vent pipe is very wet as the humid air condenses on the pipe. This is a problem as this pipe is about to be closed up behind drywall.
Is a vent pipe typically required for a sump pump? If so, what is the best way to control the condensation problem?
I know I need to check my local building codes, but I am interested in any preliminary comments or recommendations.
Thanks
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BAN wrote:

Normally, they are not vented and the cover is made to fit tightly. Treating the water in the sump once in a while with bleach will cut down on offensive odors and help control insects that like to breed in there.
For some opinions on this issue: http://www.thisoldhouse.com/toh/knowhow/plumbing/article/0,16417,195703,00.html
Jim
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On 28 Nov 2003 15:16:27 -0800, snipped-for-privacy@cinci.rr.com (BAN) wrote:

It's possible that the vent tube was installed due to the presense of radon gas from under the foundation. The sump represents a breach in the slab. I think you need to either find out who put the vent there, and ask them, or else have a radon test done. It's not something to "guess" about.
BB
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The house was just built in the last few years, so I believe it is just the builder's typical practice to add a vent. I will check with the builder and as well as the county code.
I don't see that the vent is doing anything anyway. As mention, cold air is coming IN, so there is not any venting going on.
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That sounds like a vent for radon gas. If you are in an area of high radon, that vent may be required by local code.
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Joseph E. Meehan

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