Plumbing question
The wash sink in my bathroom has a very slow drain. I have used commercial
drain cleaners many times but now even they will not work. The back up is
not in the gooseneck but after it enters the wall. This is an older house
with iron drain pipes. When I plunge it I get some nasty looking brown gunk
coming into the sink. Does anyone have any suggestions other than "call a
plumber". Thanks.
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