Sewer odours inside can suggest a dry catch, broken vent

https://telegra.ph/Leak-Discovery-101-Fixing-Hidden-Pipes-Issues-in-Geelong-Houses-04-17

Sewage system odours inside can suggest a dry catch, broken air vent, or partial obstruction; Geelong residential or commercial properties with huge trees or older sewer lines might need CCTV examinations to situate breaches and prevent recurring smells.