Start under sink probably running downward under couch. Usually no water lines under couches. Just fyi our ice maker in freezer (on sink side ) had a bad water valve and caused dripping leaking under slide on sink side. Two min to replace valve from outside access,This morning I have water leaking slowly from underneath the passenger side couch the kitchen sink area. It’s also dripping from the bottom of the slide outside. Nothing appears to be leaking underneath the sink. I’m not sure where to go from here. Any ideas? Should I pull the couch. What water line runs through there?