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Old 06-17-2010, 04:05 PM   #1
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Clogging/Slow Drain in Bathroom Sink


Hi,

I read through a few of the threads RE: slow draining and clogging sinks, and none of them seemed to address my problem.

I live in the middle unit of a duplex. I put in a new sink, with new pipes. The sink does not have an overflow (i overlooked that when I purchased... ugh). When I turn on the sink for about 90 seconds, it starts backing up. It takes about 5 - 10 minutes to slowly drain away. I can't for the life of me figure out why! I had a plumber friend come in and snake the line. He fed about 15 feet of the snake in and found nothing. Could the vent be blocked further up the wall?

Could there be a blockage where it meets 3 inch meets the 5 inch outgoing waste line?

Thank you!

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Old 06-17-2010, 04:35 PM   #2
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Clogging/Slow Drain in Bathroom Sink


Its sounds like the clog is further down the line, if it takes 90 seconds to start filling the sink after you turn the water on, that tells me that the first 90 seconds of run time is filling the drain pipe ahead of the clog before you notice it come up out of the sink. If your drain pipe is 2", and your faucet is a 2.5 gpm faucet, based on your 90 second run time, the clog is 23 feet down the line.

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Old 06-17-2010, 04:45 PM   #3
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Clogging/Slow Drain in Bathroom Sink


That would bring it underneath the house, which I do have access to. Is it better to just let the snake run further down, or should I try one of those chemical un-cloggers?
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Old 06-17-2010, 04:55 PM   #4
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Clogging/Slow Drain in Bathroom Sink


This is the type of clog that goes un-noticed for a long time since the drain pipe acts as a resevoir allowing the water to slowly drain past the clog until the clog gets so big its doing exactly what you describe. I would snake the entire line as far as possible, and depending on how other fixtures are connected to your system, snake from another fixture or cleanout, then flush the line real good to wash it out of your house.
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Old 06-17-2010, 05:34 PM   #5
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Clogging/Slow Drain in Bathroom Sink


Great response! It's pretty much exactly what I thought was going on. My plumber friend said it couldn't be, since the previous sink drained fine. My guess is that the week or so that the sink was gone, whatever crap was in the pipes dried up. Rewetting it loosened it enough to get it to all clog up in one spot. I'll snake it again tonight and update.

THANK YOU!
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