Suggested Retail:$100. SIZE UNKNOWN. JACKEL Radon/Sump Dome. The radon/sump Dome is designed to cover an existing Basin - providing a new heavy Duty cover to seal the basin against radon gas and odors; to provide adequate safety. There is No reason to dig up your basement or garage floor to remove the existing sump or Sewage Basin. Simply remove the old cover and install the Original radon/sump Dome over the opening, to create a new, completely sealed system.. . 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.