Hi, I'm new here so be gentle with me. I've got a 2006 aventura 2.2dci. After a couple of cold winters and a rubbish heater, i've decided to fit a webasto water heater. I've connected the fuel feed for heater to the fuel return line as per the instructions. What I need to know is, does the return go all the way to the bottom of the tank, or does it stop at the top of the tank and I need to extend it. Does anybody out there know the answer.