Customer stated that there was a leak coming from behind the washer and dryer. Found that kitchen drain line has a failure somewhere which is causing a leak. Told customer that we can temporarily hook up kitchen sink so it can still be used but will need to return after kitchen cabinets are pulled to access pipe. Temporary hooked up kitchen sink and tested. No leaks present at time of departure. Ball park estimate for next step will be between 1-5k. Cleaned up work area.