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How the Saniflo Macerating Toilet System Works

The term “macerate” means to soften or break up. Instead of routing waste through a drain in the floor like a conventional toilet, the macerating toilet flush water is moved to a permanently sealed macerator pump located in a small box between the toilet and the wall. The pump can also be hidden behind the wall. The macerator pump uses a fast-rotating cutting blade to break up waste and toilet paper and convert the water and waste into a fine slurry that is discharged under pressure through piping and expelled into the sewer or septic tank. Here’s a step-by-step description of the process:

  1. The water closet is flushed and the effluent is discharged by gravity through the rear spigot of the fixture and into the macerator device, which is housed in a plastic box hung on or inside a wall behind the water closet.

  2. Once the effluent rises to a preset level, a micro-switch in the pressure chamber of the macerating device is activated.

  3. Valves on each of the side inlets of the macerator box close momentarily, while the blades inside rotate at 3,600 revolutions per minute and reduce any solids within the effluent into liquid.

  4. Once the effluent is completely reduced, the micro-switch deactivates and the maceration process ends.

  5. The completely reduced effluent is pumped away from the macerating unit into a sanitary gravity drain (a soil stack or a septic tank). A non-return valve in the unit prevents back-flow of the reduced effluent into the unit.

  6. The toilet refills with water.

NOTE: Toilet flush is given priority if another appliance is simultaneously discharged until the effluent from the toilet is sufficiently reduced so that the pressure switch is deactivated..


For more information about the product line, including new-product launches, contact Saniflo at 1-800-571-8191. Or visit the Saniflo website at

For editorial assistance, including press information and photography, contact John O’Reilly c/o GreenHouse Digital + PR: 815-469-9100 or [email protected]

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