The drain plumbing on the bath sink is rusted out and needs to go. It is
silver colered but don't know what kind of metal it is (standard thin 1 1/4"
drain plumbing). It appears to screw inside the female cast iron stack.
The connection to the stack looks all built up with scale and rust and am
afraid if I take a monkey wrench to the rusted pipe it will crumble or twist
into a prezel and not turn. It there a proper tool or way to get this out?
Thanks,
Dave

Dave wrote:
The drain plumbing on the bath sink is rusted out and needs to go. It is
silver colered but don't know what kind of metal it is (standard thin 1 1/4"
drain plumbing). It appears to screw inside the female cast iron stack.
The connection to the stack looks all built up with scale and rust and am
afraid if I take a monkey wrench to the rusted pipe it will crumble or twist
into a prezel and not turn. It there a proper tool or way to get this out?
Thanks,
Dave


If you are absolutely certain that the TEE fitting in the stack is
threaded, my preference is to saw the horiz drain pipe or fitting
off as close to the TEE as possible. Then, make a saw cut lengthwise
along the horiz pipe/fitting. That will allow you to "collapse" the
pipe (with a chisel). Then it will unscrew easily.

It's a bit tricky to sawcut not too deep as to destroy the threads in
the TEE.

If the pipe is really badly corroded, you could try driving the chisel
into the sides of the pipe. It might collapse without sawing.

This is just general advice; there are dozens of different pipe and
fitting combinations you could be dealing with.

Jim