How to reinstall the sink drain without any leaks be sure all parts are removed clean and not damaged 1 add a 1 2 thick ring or rope of plumbers putty to the underside of the top flange of the sink drain warm the putty up with your hands first to make it easier to use be sure the plumbers putty is in a continuous circle.
Repair leaking sink drain.
Bathroom sink leaks are usually caused by a bad drain pipe loose pipe connection or leaky sink drain flange.
Part of knowing how to fix a leak in a bathroom sink is figuring out exactly where the leak is coming from.
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Before you attack your leaky pipe problem examine the pipes underneath the sink to identify the culprit.
Once you know where the leak originates you can repair or replace the defective part.
How to fix a leaky plastic sink drain pipe.
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The water that is damaging the cabinet or the floor may be coming from the drainpipes the supply.
Under sink leaks can do a lot of damage but they re usually fairly easy to pinpoint and repair.