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Old 06-09-2010, 11:14 PM   #1
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Can drain vents use the radon line?


Our house has radon remediation lines that originate from under the house, pass through the concrete basement floor, and exit through the roof - a fan to draw air through the system is in the attic. I'm in the process of finishing the basement and want to add a bathroom - the house does not have any rough-in plumbing in the basement for a bathroom. Can vent lines for the sink and shower tap into the radon line, which exits the house through the roof?

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Old 06-09-2010, 11:55 PM   #2
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Can drain vents use the radon line?


My guess would be no, but check with local jurisdiction to be sure. Where are you located?

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Old 06-10-2010, 07:22 AM   #3
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Can drain vents use the radon line?


Again, check with zoning, but it will work if the tap in is above the radon fan, namely between the radon fan and the open end.
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Old 06-10-2010, 07:59 AM   #4
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Can drain vents use the radon line?


You definately do not want to do this, having a powered fan connected into the sanitary vent system will create a continuous negative pressure on the sewer system. It will also redirect air flow from the radon lines into the sewer line potentially cutting off or reducing the flow from the radon collection pipe. You definately want to keep these vents separate. If you can take the new bathroom vent one level up to an existing vent somewhere, that is your best option.
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