Pride Plumbing was called out for sewage backing up into the apartment. We removed the kitchen sink’s P-trap and used a sewer machine down through the sink's drain line and cleared the blockage. After replacing the P-trap and testing for leaks and proper drainage, the issue was corrected. We ran hot water in the sink and bathtub for several minutes and flushed a toilet; everything drained properly. We also inserted a camera down into the drain line and it revealed that it was cast iron and in poor condition.