Well peed off tonight.! ! Brought a Gardiners v3 backpack a few weeks ago then ro unit last week. I set up the ro unit today and was really pleased to see the Tds at zero. I am doing my trickiest most hated windows tomorrow so thought this would be the ideal time to get the backpack up and running. I felt really excited about it so filled the back pack with pure water earlier on...switched the backpack on.....and it wouldnt flaming work!. Very disappointed. I will be ringing Gardiners tomorrow. Has anyone else experienced this?