kamkon

Thanks everybody for all your help. I am inclined to vote for radon system myself. Will remove putty to try to confirm this. I have also sent the question and pics to builder for their answer - hopefully they reply.

The centre of the hole is ~7"" from the wall. I've included pictures with a quarter next to the hole and 1 foot tape measure for scale. Carpet/underpad was covering this hole for the last 7 years. The previous owner (house is less than 12 years old) did not have toilet in this location. Water drain is about 15' away in furnace room. Hole is located at front of house in basement. Trying to determine whether its safe to remove putty and grind down pipe for laminate install (less than 5mm is probably all that is required for grinding). Thanks again for the help. Click to Enlarge 29.14 KB Click to Enlarge 33.78 KB

Download Attachment: IMG_0045.jpg 1637.72 KB Looking to put laminate flooring down in the basement. However, what appears to be a cut PVC pipe filled with putty is preventing a level floor. Anyone know what this is and whether it can be grinded down? This was discovered after removing carpet and the padding. There is already a water drain about 15 ft away from this hole in the furnace room. It is located at the front of the house. Any help appreciated. Thx for reading.