CAV Filter fuel flow direction
A very worthwhile mod to the CAV filter set up is to reverse the fuel flow - connect the fuel feed line to the outlet port, and the outlet to the inlet port. This mod causes the fuel to enter the bowl first and then flow up through the filter, increasing the ability of the filter unit to trap water. I run both my 300 Tdi Discovery filter and my Isuzu Defender filter this way. I also use 796 elements instead of 296 elements doubling the filter area and more than doubling filter life.
Christopher