Can anyone show which pipes are the flow and return from filter to engine?I had the filter off awhile back and was full of slime (diesel bug).I opened the tank via the sender unit but it's baffled and can't clean it so was think of sucking the fuel out through the fuel lines to also rid the bug from there too.I need to then get a biocide to keep it from reforming. (2006 T25 pre-face lift 1cd-ftv)