radon vent pipe 3

https://theradonreductionsystemscope.pinehavenscope.com/posts/why-a-radon-reduction-system-matters-for-your-home-s-safety

When we had the radon vent pipe installed, it was a straightforward plastic pipe running from under the slab up through the roof, meant to safely draw that radioactive gas out of the crawlspace before it can seep into the living areas. It needed a dedicated fan in the attic to keep air moving, and I check the manometer monthly to make sure suction is holding steady. It's not pretty, but the peace of mind is worth the small eyesore against the house.