No trap in the shower drain causing odours in an ensuite
There is airflow coming up through a drainage hole in my shower, accompanied by a sewerage or gas smell. During mosquito season, mosquitoes also come through this outlet. Both the strata company and the builder have told me that it is my responsibility to hire a plumber to fix the issue. I’ve had to tape over the drain and stopped using the ensuite. Who is responsible for investigating and resolving this problem?