bostonbernie Report post Posted October 10, 2016 I HAVE A 2013 33C FLEETWOOD WITH A DOMETIC VACUFLUSH TOILET,NOW IT IS WORKING BUT JUST RECENTLY WHEN FLUSHED AND REGENERATING A VERY NOTICEABLE THUMPING SOUND AROSE. I HAVE READ SOMETHING ABOUT LOOSE SCREW ETC..VERY MUCH IN NEED OF SOME ADVICE. THANX IN ADVANCE! Also what would be the location to access the problem Share this post Link to post Share on other sites