PITTSBURGH, April 24, 2025 /PRNewswire/ -- "We wanted to create an improved pipe adapter that would be used to permit the vertical stacking of septic tank risers," said one of two inventors ...

Inside a septic tank, grease and oil (known technically as scum) rise to the top, while solid waste (called sludge) settles on the bottom. Risers on top provide access for maintenance. By Jessica ...