Does the kitchen sink drain into a washing machine drain pipe?
On One Hand: Washing Machine Drains Are Large EnoughThe washing machine drains water into an open plumbing drain that empties into the main house drain and eventually into the sewer. The drain pipe is large enough that it could accommodate the flow from a kitchen sink. It even ties into the main vent stack to allow venting.On the Other: Washers and Kitchen Sinks Are in Different RoomsA typical kitchen sink drains into a specific size drain pipe. If there is a garbage disposal attached, the sink drains into that, which then drains into the drain pipe. A dishwasher further complicates the plumbing because it drains into the sink drain pipe before it enters the garbage disposal.Bottom LineIf the kitchen sink and the washing machine share a wall, it may be possible to allow the kitchen sink and the washing machine to drain into the same pipe.
