Ayuh,.... Then the water level under the slab should be no higher than the water ya see in the sump pits,....House was built in 2014.
Already have 2 sump pits, 4 sump pumps and Generac.
My sump pits have channels that goes to the perimeter channel.The details I have read about show the sump pits covered and sealed so the radon fan can pull a negative pressure below the slab. If the pit and system are installed at the same time they have lids specifically for that.
Haven't checked in the attic yet. I don't want to pump radon internally through the house anyway.Was the plumbing for your radon system installed when the house was built?