Drainworks Pipe Relining and Blocked Drains Clearance in Sydney’s Eastern Suburbs This is video footage of a blocked drain (main sewer line). It is infested with tree roots – the main cause of blockages in the Eastern Suburbs of Sydney. When jetted, it will be completely clear. If you think you might be experiencing a issue with tree roots infiltrating your drains and pipes contact our experienced team of emergency plumbers at Drainworks Eastern Suburbs Blocked Drains on 1300 762 336.