Scale Build-up: In hard water areas, limescale can coat the internal components and the pressure switch, causing the motor to run constantly or fail to start.
There are two places a Saniflo blocks:
If the unit is making a loud buzzing sound but the water isn't moving, something is likely jammed in the blades. Disconnect the unit from the power and the toilet.
Locate the non-return valve, usually found where the discharge pipe exits the Saniflo unit. Check if the valve is stuck shut or clogged with debris.
If your Saniflo is humming, vibrating, or failing to pump out water, it is time to take action. Here is how you can safely and effectively unblock your Saniflo toilet. Identify the Cause of the Blockage