If you have a drain lever on your overflow, it might not be adjusted
properly, meaning the drain would be partially closed. To get to it,
remove the 2 retaining screws on the overflow drain and the whole
assembly should just come out. Now test and see if the water goes down
your drain correctly. If it does, the drain stop needs to be adjusted.
If it still goes down slow, you have a stoppage someplace else.
Mechanical cleaning of the hair is likely the best solution. If you can
removed the stopper you may be able to see some sort of cross piece and that
may well have a think covering of hair and moldy soap scum. If you manually
clean that I'll bet you will not need anything else done and many cleaning
methods will not clean out the hair. I find a pair of tweezers good for the
The stopper is one of those 'pull up and turn to drain and turn slightly and
it drops down'. I can remove the screw from the top of the stopper, but
that's all that happens. Can't get the rest of the stopper to come out so I
can get to the cross piece. Any suggestions on how to do that?
Pull up on the "knob" and turn CCW slowly. You should feel
a point where the knob meets resistance. Stop there but
continue pulling upward.
Now, take a slip-joint pliers and grasp the outer edge of the
stopper and turn it CCW. It *should* unscrew.
And then coat the threads with a little grease or Vaseline before you
replace it to make it easier next time. If you need to use pliers to get it
out you have a minor problem that lubrication will avoid.
BTW the hair ball will usually be within 24" of the drain. Anything you can
insert and snag with will work for pulling it out.
The gel stuff in "pro" strength seems to work the best.
There is a plastic zip strip about a meter or so, for a couple of bucks,
to stick in, and pull out the hair. Haven't tried it yet, but for a
couple of bucks, it is hard to go wrong.
If it is a hair clog it is best to remove it.
But I had a problem where even if I ran the sink hard (or filled and
drained it) it would back up into the bathtub drain. Apparently there is
some sort of round chamber in the wall that both the bathtub and sink
drained into and that was slow to drain. Drain cleaner in either the
bathtub or sink did not seem to be able to clear it.
I let it drain down. Then about half a cup of Spic 'N Span powder and a
tea kettle of boiling water in the sink got everything flowing.
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