I have a vintage American standard sink and I am trying to replace a leaking metal p-trap. I was able to disconnect the pipe to the sink, but I can’t remove the piece in the back...(see yellow arrows). Any help is greatly appreciated.
You not only have to remove the sink, you will undoubtably have to cut the pop-up drain assembly off with a Sawzall. Replace with a Chrome plated one of decent quality. Price Pfister at least. That P trap is worth saving. What vintage is it? Look for date stamp on the sink.