On Friday, July 1, 2016 at 9:26:46 AM UTC-4, wrote:
On Wednesday, June 29, 2016 at 9:54:08 PM UTC-4, wrote:
The foundation drain sump pit is where you can expect to find radon, if anywhere. The sealed unit you are talking about shouldn't have any place for radon to infiltrate.



Aren't the foundation sump pits perforated to allow water to enter?

If water can get in, so can radon.

I think a small air pump pulling air from the pit to the outside is good for getting rid of odor as well.

often homes well above street level have sump pumps......... kinda dumb. far better to drain interior french drain water to daylight. no pump needed. and since radon is heavier than air it can ventilate the radon gas to daylight too, far away from the home.

gravity is highly reliable, and free, and isnt effeced by power outages