Sewage system odours inside can show a completely dry catch, cracked air vent
https://adeneulsxv.raindrop.page/bookmarks-69901942
Sewer odours inside can show a completely dry trap, fractured vent, or partial obstruction; Geelong residential or commercial properties with big trees or older sewer lines may require CCTV examinations to locate intrusions and stop reoccuring scents.