The Original Radon – sump dome is designed to fit over an 18″ square or 24″ diameter sump pit to prevent radon gas from entering the home through the sump pit. The sealed lid will help reduce radon gas as well as other gas infiltration.




  • Easy to install
  • Fits over existing sump pits up to 18″ square or 24″ diameter
  • Made from rugged structural polyethylene
  • Radon gas and odor tight
  • Heavy-duty and child safe
  • Adaptable with a variety of spaces for different connections
  • Equipped with a full range of flanges that fit every size pipe
  • 1-year warranty
  • Made in the USA

Short-term Radon Testing. 
We provide 48-hour testing for new home construction requirements as well as for anyone who is curious about any existing radon levels in their home. A continuous radon monitor will provide an hourly report regarding the radon levels at that time.