I haven't called varitech yet, but I watched my waste water closely this morning. it is generally not flowing when my van is full, it just has 15 second or so pulse every 1-2 mins.
if a move my van a little by opening doors, the water in my tank moves a little, moving the float valve slightly and switching production on very slightly, which produces waste.
as this is the case, I don't really think I have a problem with my merlin.
cheers all
