Should I replace drain or leave it.

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  #1  
Old 10-29-15, 06:43 AM
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Should I replace drain or leave it.

I am replacing cab.The copper pipes will be redone and put under base of cab floor and come up under sink.The drain is another question? The house is about 41 years old. Should I leave well enough alone or CUT the drain going down and replace with newer plastic.Would cutting cast iron drain cause a problem below. Another point is right now the trap will be right in the middle of two cab walls.I would like to move it into one cab so only a hole is going through the wall of both cab. In doing so I would have to undo the pipe (nippple) leading to the trap and the T. I am wounder about the threads of the old pipe(nipple) and the T.
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Old 10-29-15, 06:55 AM
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You have galvanized steel drain piping with cast iron fittings and a bronze trap. All of that should be replaced with plastic. You MIGHT be able to keep the galvanized vent piping but the drain piping is almost certain to be clogged with rust and corrosion. If this goes into a basement or crawlspace all the accessible galvanized steel should be replaced.
 
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