The sewer cleanout adjacent to my parking bay was run over and the cap is now broken. For whatever reason the contractors installed a 6" diameter cleanout for a residential townhouse. I want to replace the cleanout cap with one that is traffic rated. I assume I can use a rotor tool to cut off the top, broken area (cutting it from the inside) and then just set the new cap onto the vertical PVC pipe extending to the ground level...? Secondly, does anyone know where I can find a 6" diameter, traffic rated cleanout cap? Thanks!