Washer Backing Up Into the Kitchen Sink? Here's Why

When your washer drains and your kitchen sink backs up, that's not a coincidence. That's a clog sitting deeper in the shared drain line - past the point where any store-bought fix is going to reach. It's one of those symptoms that homeowners often ignore for a while, hoping it sorts itself out. It doesn't.

On this call, old galvanized drain lines were part of the problem. Galvanized pipe corrodes from the inside out over time, and that rough interior surface is a magnet for buildup. By the time you're seeing backups at the kitchen sink, the restriction is usually pretty significant. Snaking from under the cabinet with a power drain machine is how you actually get to it.

We ran the line out, cleared the blockage, and then camera-verified the fix. That last step matters more than most people realize. A camera inspection confirms the line is actually clear - not just punched through - and gives us a look at the overall condition of the pipe while we're in there. No guessing, no assuming.

Good flow was restored and the backup was done. That's what drain cleaning done right looks like - not a temporary fix that buys you a few weeks, but a verified clear line with documentation to back it up.

If you've got a backup that keeps coming back, or water showing up somewhere it shouldn't when another fixture runs, that's worth having looked at. Those are signs the problem is downstream and needs more than a plunger.