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Holes in Radon Pipe

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Initially, when I read it, I thought condensate drains but those holes aren't how condensate bypasses are done on radon systems.

On the pressure side of the fan, I'd guess air is coming out the holes, not getting sucked in.

I think Chad has the best answer!

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One of my partners ended up talking with the tech who installed it - it's a condensate drain: 


He said that they've stopped using them because they felt that the 2" pipe caused a restriction in airflow and because they figured that condensation isn't going to be the limiting factor in the fan's service life anyway. 

Condensate Drain.png

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Looks like it works the same as the one in my picture, only shorter. 

Also, I can't see the benefit of routing the condensate back into the radon pipe below the fan. Why not let it drip on the ground or plumb it to a rain drain or other place of disposal? 

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Beats the hell out of me, Jim.  I'm not a radon mitigator, but I see a lot of them around here given Mother Nature's propensity for spitting it out in Central Kentucky.  
The cold weather times around here have created some ice mounds around the fan when it's not routed back into the pipe to go back into the ground at the base of the pipe. Easiest place to dispose is right back into the pipe below the fan.

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4 hours ago, Tom Raymond said:

How is condensate being sucked through a fan differ from condensate dripping through from the other side? The fan is wet either way.

The fan moves only the vapor.  Any liquid condensation that forms goes downwards as per gravity.  The bypass tube simply allows the condensation to bypass the fan.

I'm guessing.

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