Gordon has hit it on the head, you want to catch anything coming AFTER the pump, before it can clog the shutoff valve or the turbine. The pump can pretty much take anything a UAT can offer it (you get a lot of filter action from a UAT BTW). We put the UAT into the manual, it really is a pretty much mandatory piece of equipment as far as JetCAT USA is concerned.

As for the kero filter, we believe that, incorrectly installed, the kero filter can become a sort of air trap, capturing "micro" air bubbles and thereby creating an air pocket within the filter itself. At the wrong time (of course!) the pocket gets expelled, goes into the turbine and you flame out.

So first and foremost, mount the filter vertically. That will allow these "micro" bubbles to go through the pump and on to the turbine without adverse effect.

As for not rigid mounting, if the filter is loose on the line, the natural jostling of the plane will help dislodge any micro bubbles before they get big enough to matter.

Also a loose mounted filter is easier to check for dirt and to flush as needed. Over time you will need to do that.

Good luck

Matt