When your Saniflo starts humming but not flushing, or worse, makes a grinding noise of despair, panic often sets in. Before you call an expensive engineer, it helps to understand how the system works and what typically goes wrong. A Saniflo unit (often called an "upflush toilet") sits behind or inside your toilet. When you flush, the macerator uses sharp rotating blades to shred toilet paper and waste into a fine slurry. A pump then pushes this slurry upwards through small-diameter piping (usually ¾-inch or 1-inch) to join your main soil stack.
The pressure switch has failed or there is a slow leak from the toilet bowl into the macerator (water is seeping in, tricking the unit into thinking it needs to pump). saniflo macerator repairs
Saniflo macerators have revolutionized home design, allowing homeowners to install a full bathroom in basements, attics, or loft conversions where traditional plumbing would be impossible. However, like any mechanical appliance, these units can and do break down. When your Saniflo starts humming but not flushing,