(It appears that Ted has confused a VacuFlush toilet with a clothes washer)
I suspect this is a problem caused by using too little flush water, resulting in a buildup of solids or TP in the line to the vacuum tank. VacuFlush is one of the few toilets in which you can use a plunger without damaging anything. Try using one with about a half bowl of water and a little dishwashing liquid (Dawn is good).
And from now on, keep the pedal down at least 3 full seconds after urine only...7-10 seconds for solid waste in at least 1/3 bowl of water. The flush water volume is too wimpy to fill the hoses, so it doesn't rinse them out. So flush a full bowl of water daily last thing before you turn in for the night.
I've written a piece I call "VacuFlush 101" that explains how it works (many owners think they do, but actually don't) and how much water it really needs to prevent at least 90% of problems. I'll be glad to send it you--and anyone else who wants it--if you'll send me an email (no way to attach anything to a post or a PM)...I can attach it to a reply.
--Peggie
peggie.hall@gmail.com