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Question:

bathroom sink water reverse flow?

I live in the first floor of a two floor apartment. When someone in up-stair uses the kitchen sink, the dirty water flows back to my kitchen sink. It stays in the sink for couple of minutes then goes away. Sometimes the odorous water overflows and makes my kitchen floor very smelly. The super of out apartments seems to be struggling to find out why it is happening. He changed the pipe. cleaned it, etc. nothing seems to be working. DOes anyone know the cause. Please help! It snowed yesterday, and I do not have if that has anything to do with the situation.

Answer:

There is a plug down your line to the main line.....somewhere. He needs to have that line snaked out. You can try using a drain product like crystal drain-o before you go to bed at night when neither of you is using the water. In the morning flush with hot water.
Sounds like the vent pipe is plugged on the roof. If your sink is overflowing when they use the sink upstairs then the drain system is using your sink for the vent which will cause water to back up on lower units. It would be the first thing I would have checked.
you both share a common drain line and some body is putting grease down the drain and its choking the pipe, drain cleaner and a sink plunger might clear it if not then a small drum auger will help. then followed by lots of hot water, and tell your upstairs neighbor to refrain from using their sink until you finish clearing the drain, for best results bail out the water and have hot water ready to put in . people take for granted that all goes down ok but after time it builds up to the point of blockage that pipe is cold and it clings and just builds up to where a pea can block it. good luck and just changing a piece of pipe don't get the blockage I have a 35 foot drum snake and some times I barely make it to the clog it (the kitchen drain line) runs all the way to the main sewer line .

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