What Is An Upflush Toilet And How Does It Work?
An upflush toilet sends waste into a pump or macerator rather than relying only on a conventional floor outlet. The unit processes wastewater and pushes it through a discharge line to an appropriate building drain.
Key Takeaways
- Start with the room and installation constraints before choosing a product.
- Verify changeable dimensions and specifications against current model documentation.
- Preserve practical access for installation, inspection, and future service.
The Basic Cycle
After a flush, the pump activates automatically, processes the incoming waste, and moves it through the discharge route. Compatible models can also receive wastewater from a sink, shower, tub, or other listed fixtures.
What Upflush Does Not Mean
It does not mean 'no plumbing.' Water supply, discharge, venting, electrical power, and a lawful final connection still matter.
What The Macerator Actually Does
The pump receives wastewater after a flush, reduces solids so the mixture can travel through the specified discharge piping, and activates automatically when the internal level or pressure condition calls for it. The exact activation method and internal design vary by product, so troubleshooting should follow the model manual.
How Additional Fixtures Connect
Many full-bath macerators include side or lower inlets for graywater fixtures. Simple Project's current two-piece 600W SNFLEX documentation lists connections for shower, sink, tub, and washing machine through 1½-inch-class inlets. Inlet height matters: a shower still needs enough fall to reach the pump.
What Happens During A Power Outage
A powered macerator cannot pump normally without electricity. Treat that as an operational constraint and avoid repeatedly using connected fixtures when the pump cannot discharge. If outages are common, include that reality in the system decision.
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Related Guides
How Upflush Toilets Work · Installation Planning · Best Upflush Toilets For Basements · SNFLEX 600W Review
Considering A SNFLEX Upflush Toilet?
See current models, specifications, availability, and included components directly from Simple Project.
View SNFLEX ToiletsFrequently Asked Questions
Can An Upflush Toilet Run A Sink And Shower?
Some systems can. Current SNFLEX two-piece pumps include additional fixture inlets, but inlet height and model instructions control the installation.
Do Upflush Toilets Work Without Electricity?
The pump needs power to discharge normally, so connected fixtures should not keep being used during an outage.
Is A Bigger Motor Always Better?
No. Choose from measured lift, run, fixture load, connections, and service requirements.
Freshness Note: Changeable product details and support information on this page were reviewed in September 2026. Verify current manufacturer documentation for the exact model before purchase or installation.