Reported by a club member, they requested urgent plumbing service after the downstairs toilet overflowed when the upstairs toilet was flushed, causing wastewater to back up onto the bathroom floor and producing noticeable gurgling and abnormal flushing noises throughout the system. The issue appeared to have developed overnight or early that morning, and plunging attempts were unsuccessful, with no visible exterior cleanout identified. Our certified plumber responded promptly and performed a professional main sewer line hydro-jetting service, using high-pressure water to thoroughly clear the obstruction, restore proper drainage, and ensure the sewer line was fully cleaned and flowing correctly.