Ok, I'm at a complete loss on this one. I have a bathroom sink on the first floor of my home that has a clog deep in a pipe somewhere. The house has cast iron waste pipes throughout.
Anyway, I can run the water and it appears to drain but after 10-15 seconds, it starts backing up. I've tried plunging it, snaking it (with a 25 foot hand snake and a 25 foot, 5/16 inch power snake) and no matter what I do, it's still draining slow. The pipes don't have that far to go before they reach the main sewage line (maybe 15 feet total so the 25 foot snake is plenty). I obviously can't see behind the wall but from what I see in the basement, this pipe drops right down through the basement ceiling, runs along it, and then meets up with the main sewage line. So I'm pretty sure it's a dedicated waste line from sink to main sewage line. Everything else in the house drains perfectly fine, it's just this one sink.
I thought that maybe the bathroom sink (directly above this one on the 2nd floor) share the same drainage pipe but I don't think it does. I ran the sink upstairs for a good 2-3 minutes this morning to see if the sink downstairs would back up. It didn't.
I'm thinking of having someone come in to snake or fix it but I don't want to spend a couple hundred bucks. I could replace the waste pipe with PVC for a lot less.
Anyone have any ideas? This thing has me incredibly frustrated!
Thanks in advance,