I'm redoing my bathroom and considering an idea of a stacked laundry
closet in there. The place I'm considering is where one of the sinks
was. Is it possible to use the previous sink drain plumbing to drain a
washing machine into? or would it be too small? Its and 80's house on
slab with pvc i think the sink drains are all 1 1/2 inches.

I would think it would be ok, especially since the newer washers
typically use less water...

Thanks for any advice someone can provide.- shawn