The sound was different—high-pitched, clean, and loud. The water in the bowl swirled violently and vanished instantly. The unit ran for its usual few seconds and clicked off. The red light stayed off.
For the uninitiated, a Saniflo isn't like a standard toilet. It doesn't use gravity to pull waste down a wide pipe. Instead, it uses a macerator—a powerful blade that churns waste into a liquid slurry—and a high-pressure pump to force that slurry through narrow piping (usually 22mm or 32mm) vertically or horizontally to the main soil stack. how to unblock saniflo waste pipe
Because the blockage was just inside the discharge pipe, I was able to use a pair of long-nosed pliers to grab the mass. It was tough, like pulling a cork. I twisted and pulled, and suddenly, a glob of black sludge and scale released. The sound was different—high-pitched, clean, and loud
I had two hours. I started gently.