radon pipe in basement

https://fun-wiki.win/index.php/New_Pennsylvania_Radon_Disclosure_Rules_Take_Effect_for_Home_Sellers

The radon pipe in my basement runs from a small hole in the concrete slab up to the roof, with an inline fan that hums quietly. It's supposed to pull radioactive gas from under the house and vent it outside, keeping the air safe to breathe. I check the gauge on the pipe every few months to make sure the fan is still working—it's one of those things you don't think about until you test for radon and realize it's a real problem in this area.