Original dishwasher drain line goes into a half inch pipe inside the wall which then I don’t know where it goes to instead of trying to figure out how we can unclog a Johnson’s T she opted to have a disposal installed on the right side of the sink which allowed me to connect the dishwasher directly to the garbage disposal and use that as the drain while installing the garbage supposal did a full rebuild of all of the drain piping to accommodate this new disposal follow the manufacturers instructions and knocked out the dishwasher plug and adapter over to the larger size diameter pipe to make the connection between the dishwasher drain hose and the garbage disposal load tested sink no leaks