Slow Drains: If every sink and bathtub in the house is draining slowly at the same time, the issue is likely in the main line rather than an individual fixture.Gurgling Sounds: Bubbling or gurgling noises coming from your toilets or drains when you run water elsewhere are a classic sign of trapped air caused by a clog.Sewage Smells: A persistent odor of rotten eggs near your drains or out in the yard above the septic tank indicates gases are being pushed back into the house.Lush Patches of Grass: If one area of your lawn is suddenly much greener or soggier than the rest, it may indicate a break or a leak in the line leading to the tank. How to Fix the Problem
"Bubbling over," Elias said, gesturing to the soggy ground near the tank.
"Okay. Two things usually block a line," Gus said, walking toward the tank. "Physical debris, or root intrusion. Let's see what we got."