CLOTHES WASHER / LAVATORY / DISH WASHER The vertical drain starts above the floor with a 3 x 2 inch wye (clothes washer drain), to a 3 x 1 1/2 inch wye (lavatory drain), to a 3 x 1 1/2 inch wye (dish washer drain) to a 3 X 3 inch wye for a clean out to a hubless connection to the original cast iron drain. img 2538
