265 Express ( Head)

Bob Meola

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Went to pump out station this morning and pumped put the head. All good. Came back to dock and put new chemicals in and flushed toilet as usual. Came back later to boat as I forgot phone and when I look in head it looks like the water came back in to toilet. Sea cock is closed on both pump out and intake. Any suggestions? Thanks
 
Following as I have this happen all the time. I'm guessing that it's residual fluid in the line that seeps back into the bowl after pumping it 'dry'. Curious to see if others have solved this problem.
 
I thought there might be something wrong with mine. The valve on the toilet pump has position for Inflow and for outflow but I seem to get some inflow when flushing OUT.
I was thinking its a valve problem. My brother says its normal. IDK
 
Mine does the same thing and it is an electric flush. Based on the video does that indicate a malfunction in the pump