Vacuflush toilet
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Join Date: Jul 2005
Location: evansville In
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You probably have an air leak as the pump for a vacu flush pumps to build a vacuum on the toilet. Also look at your bill valves on each side of the pump. You can add a little water in the bowl to see if it has a leak at the ball in the toilet. There is also a pressure switch that is mounted on the tank next to the pump.