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Old 05-16-2020, 08:36 AM   #16
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When a radon mitigation system is installed and a suction test hole is drilled in concrete floor should the suction test hole be filled in after the radon mitigation system is installed. If it isn’t plugged or filled in does it pose a risk for unwanted water entry in the basement?

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Old 05-16-2020, 10:07 AM   #17
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Re: Radon mitigation install


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Originally Posted by Popcburns View Post
When a radon mitigation system is installed and a suction test hole is drilled in concrete floor should the suction test hole be filled in after the radon mitigation system is installed. If it isnít plugged or filled in does it pose a risk for unwanted water entry in the basement?
Yes, all test holes and cracks/joints in the concrete to keep the pull of air coming from under the slab. If you have chance of water entry there are other problems to address.
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Old 05-17-2020, 05:27 AM   #18
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Thanks - So did you say the suction test hole should be plugged or not?
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Old 05-17-2020, 06:43 AM   #19
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Re: Radon mitigation install


Good morning popc,
Yes he said fill all test holes. There should be a "u tube manometer" somewhere attached to the exhaust pipe that will indicate the desired level of negative pressure the system in creating. Too many holes in the slab defeats the fans ability to create that negative pressure.

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