I use two filters on my fuel container. I have a filtered clunk and an inline filter after the pump on the hose that I connect to the jet. I also have a filter in my UAT plus one filter between the pump and the turbine. Logic is as follows, I am protecting against foreign debris from the truck at the airport (i use Jet A-1), & I filter for potential debris potentially introduced by the fuel can pump and turbine pump. It's cheap insurance.