RE: Windshield washerpump ?
Thanks for the update. I upgraded my 4S and 2S fueling systems with Slimline PRO CAP fuel jug caps and went back to a maunual pump one one. These caps are expensive but they completly seal the jug. The fuel jugs can be seen collapsing when the air pressure goes up. Chief Aircraft and probably others have Slimline fuel parts in stock. If I had to get an electric pump I would use the Hobbico Top Fueler MK III.