Just read this guide for EPSON http://www.continuousink.info/forum/kb.php?mode=article&k=7&page_num=7&start=0
"The ink container MUST be placed so that the highest possible ink level is still lower than the printhead"
Is this true for canon? I have installed a few waste ink tanks and I just place the bottle near the printer at the same level. The tubes a routed on the bottom inside the printer but at the end it is higher then printhead because it must read the top of the bottle.
I Don't have any problems but need to make sure.