A radon vent pipe typically runs from the soil under a house's foundation up through the roof, quietly siphoning radon gas outside before it can seep into living spaces. It's usually a white PVC pipe, often with an inline fan to create suction, and its visible exterior section has a distinctive capped look. Properly installed, it helps reduce indoor radon levels without any fuss—just a passive, steady flow keeping the air safer. radon vent pipe 8