Please check with us first if your sewer backs up. Sometimes a sewer backup is within the sewer main line, which is Union’s responsibility to repair. Sewer backups in the lateral pipe leading from the home to the sewer main line are the homeowner’s responsibility. Please call us Monday through Friday from 8 a.m. until 5 p.m. at 937-836-8624. After hours and weekends, call 937-836-2678.