12-29-2016, 06:52 AM
Not sure where the Vacuflush pump is in a 31 Open but my 38 Open has it located in the engine room. Suspect the same for the 31... Does the Vacuflush pump sound like its running when you flush (Open engine room day hatch and have someone flush so you can listen)? If so I suspect you need to change the "DUCK BILLS".. They are located before and after the pump and require replacement when the pump works and the head doesn't empty correctly........ I've attached a diagram of a vacuflush pump. The duck bills are item # 12.... Just a guess...
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