Indicators like slow drainage, foul odor, and gurgling noises often identify blocked Drain Sydney. Slow drainage indicates that water is taking longer than normal to empty the sink/bathtub. A foul odor is a sign that trapped debris is causing the blockage. Gurgling sounds could also symbolize that air is trapped within the pipes. For more info: - https://www.edocr.com/v/dbrzy8nd/auyassplumbing/preventive-measures-to-avoid-future-drain-blockage