radon venting

4" diameter PVC radon vent piping being installed in layer of 3/4" crushed stone.  the stone layer has sufficient voids to allow air movement.  if the indoor air quality test (after construction) indicate unacceptably high radon levels, then a fan is connected to create a negative pressure under the concrete slab and exhaust that nasty radon to the outdoors.

4″ diameter PVC radon vent piping being installed in layer of 3/4″ crushed stone. the stone layer has sufficient voids to allow air movement. if the indoor air quality test (after construction) indicate unacceptably high radon levels, then a fan is connected to create a negative pressure under the concrete slab and exhaust that nasty radon to the outdoors.

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