Previous Next DescriptionPhotosWolff Underground Plumbing in Appleton , Wisconsin Call to request an estimate: (920) 738-1880 Wolff Underground N8663 Old Hwy 47 Appleton, Wisconsin 54915 Water Heater pro Logo main Map Loading... No Records Found Sorry, no records were found. Please adjust your search criteria and try again. Maps failed to load Sorry, unable to load the Maps API.