Bathroom sink drain connection


Old 05-13-05, 09:49 AM
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Bathroom sink drain connection

Replacing original (1941) wall-hung sink with new wall-hung sink. The trap and drain pipes need replacing, but the connection for the drain pipe to the DWV pipe is within the wall. I opened the wall up around the drain connection, but do not know how to disconnect the drain pipe. The DWV pipe in the basement below the bathroom is galvanized and I assume the "fitting" that the sink drain pipe goes into is also galvanized. The sink drain pipe is 1.25" but the pipe that is goes into has an ID of 1.5" and looks like it was soldered in. Could it be some type of soldered bushing that has threads on the outside? Should I remove this? It is not leaking. Or should I cut the sink drain pipe near the wall and use a Fernco coupling to connect to the new chrome pipe/trap? And are there escutheons deep enough to hide the Fernco? Any other methods? Thank you!
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Old 05-18-05, 06:23 PM
Join Date: Aug 2003
Location: KY/OH
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You can use a fernco, but the correct method would be to heat up that soldered fitting and remove the threaded connection from the piping and use a PVC threaded desanko to transition to 1.25 or 1.5" tubular PVC piping.
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