Hi Jim...

With some rearranging of the piping you sure can... ;)

Are you trying to install a sink in addition to keeping the washing machine drain/vent in place or is this sink going to completely replace the washer drain/vent? Let me know, OK?

Mark

Thanks. I do want to keep the washing machine, and don't think it's going to work without rearranging pipes, so think I won't do it after all.

You could always use the washer drain/vent for the laundry sink and just dump the washer hose in the sink.