回複：Use power snake or get e professional to help you.

What kind of professional to get rid of the root.

This time, Washington Sewer & Drain cleaned the drainage,they used camera when they did the job, so I could see some tiny root held some toilet paper and blocked the pipe. they told me they need replace 戶外距離房子5英尺遠的一段下水道，開價3000-3500美元。