I had a clogged bathroom tub drain so I poured some Liquid Plumber
down it. Now the silver metal flange around the top of the drain has
become rusted and is breaking apart. I have no access to the bottom of
the tub other than cutting a hole in the ceiling below. Any way of
repairing/replacing the flange.
That flange/drain screws into the tub "shoe" which is a brass
"elbow" under the tub. The shoe is sealed to the bottom of
the tub by a rubber gasket. The flange seals to the top
with putty. (Just so you know)
It is *possible* to unscrew the flange part using a tool which
fits the cross hairs (or other means). Often, these are in
there tight from corrosion and you could wind up ruining it.
To get a replacement you would have to run around and try to
match the thread size with what is available today. <ugh>
If you have an access panel at the front of the tub it may be
(barely) possible to remove the shoe from underneath.
Otherwise you're looking at patching the ceiling.
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