I've been struggling for a few days trying to unclog a bathroom sink that is extremely slow to drain. I tried the following:
- Removed and cleaned P trap
- Snake: Cheapo ($30) 25ft 1/4" drum auger with drill attachment. I hit resistance at varying points along the way which I broke through with a few trials until I had the entire snake fed through. I did it a few more times because I still felt areas of resistance, but eventually the snake became kinked and it became useless.
- Baking soda/vinegar
- Plunging: This brought up a lot of nasty black biofilm, but since using the shop vac I don't get much of this anymore.
- 6 HP shop vac in both directions (suck and blow). When in blow mode, it pushes the water through just fine, but when I turn the water back on the clog remains. It does take about 20 seconds of running water until it backs up into the sink, so that tells me the clog is probably far down.
I'm not sure what else I can do other than call a plumber. I'd rather not use harsh chemicals. Any ideas?