I had a very similar situation a couple of years ago. A plumber cleared the clog, everything seemed fine for a while, and then the same problem came back. What finally helped was working with a company that didn’t just remove the blockage but actually inspected the condition of the pipes with camera equipment to identify the root cause. In my case, there were buildup and structural issues that a basic drain cleaning couldn’t solve. If you’re dealing with recurring backups, I’d suggest looking for a service that specializes in professional drain pipe cleaning serving Seattle and offers thorough diagnostics along with cleaning. A comprehensive inspection can save a lot of time, money, and frustration compared to repeatedly treating the symptoms.