Oliver

Have you done any experiments not using a UAT, it seems the whole problems stems from the UAT bag looking at the posts here, I have been using an Orbit membrane clunk in the main tank without a UAT on a 120SX admittedly not the same fuel demand as the 160 or 200, but I don't get any air in the lines at all, 6mm Tygon from the tank too the pump and 4mm everywhere else, again admittedly a single tank installation so slightly different application, but probably the most often used.

Mike