For a blocked drain in Wollongong, try removing visible debris and using a plunger, but avoid repeated chemical drain cleaners because they can damage pipes and create safety risks. Call a licensed plumber if water is backing up, several drains are affected, there is a sewage smell, or the blockage keeps returning. A local plumber can inspect the pipe and advise whether a drain snake, high-pressure water jetting or a camera inspection is appropriate. Ask for a clear quote before work begins, as the final cost depends on the blockage, access and required equipment.