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Old 09-07-2015, 07:06 PM   #1
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Plumber's Putty for Sink Drain Leak?


I hope this is easy: The sink in our bathroom will not hold a basin of water when the stop is closed. I thought it was the stopper itself, but when brushing my teeth, I watched as the suds went into the gap between the sink and the drain lip instead of straight down the drain. Strangely, there is nothing leaking under the sink. Not sure where the water is going. Underneath there is a large nut holding the drainpipe tight to the basin and between that and the sink is a rubber o-ring. I'm hoping a dab of plumber's putty under the drain flange will do, but not sure. Any better ideas? Thanks!
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Old 09-07-2015, 07:13 PM   #2
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Many sinks have are a 'bowl within a bowl'. If there's an overflow hole near the top of the sink bowl then that likely runs to a 'collar' of sorts that the drain tail piece goes through before making it's connection to the trap. The water leaking around the lip is going to the same place the overflow would. The simple fix would indeed be to remove the drain assembly, clean the surfaces thoroughly and use a new bead of plumbers putty in-between it and the sink bowl. Squeeze it tight enough to force out most of the putty, clear away the excess and you're done.
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Old 09-07-2015, 07:55 PM   #3
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Thanks! Your explanation makes sense. Gonna give it a go now.
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Old 09-07-2015, 08:47 PM   #4
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Jeez, it's been a while...

Meanwhile, the collar is stuck to the drain pipe so I have it soaking in PB Blaster.
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