1. Vacuum is maintained in the system at
all times. Before use, the water level in the bowl can be raised by simply lifting
the flush lever. 2. When the toilet is flushed by pushing down on the foot
lever (for three seconds), the vacuum energy stored in the system is
released. The bowl is instantly cleared and the waste is moved through the vacuum
tank, the vacuum pump, and ending up in the holding tank (not pictured),
at seven feet (two meters) per second. The change in pressure in the vacuum
tank causes the integral pressure switch to activate the vacuum pump. |
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3. After the flush lever is released, the
vacuum pump continues to run until the vacuum level is recharged in the
system. Recharging the vacuum takes about one minute. |