The upflush system is a sophisticated drainage system that utilizes the gravity of wastewater to automatically flush out the toilet bowl. The inlet pipe and outlet pipe are connected to each other, via a U-shaped bend, with an air valve at each connection.
When the toilet is flushed, water flows into the inlet pipe creating positive pressure as it travels down to the outlet pipe. As this happens, excess water will flow back towards the U-shaped bend where it will fall into a bucket below or back into sewer or septic lines depending on where they lead."
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