ORIGINAL: aangelet
According to Sportwerks, the fuel filter is purposely in the pressure line to prevent a lean situation which can occur when you have a full tank of fuel and fuel backwashes into the pressure line causing a drop in pressure in the fuel feed. They say that the tank has a fuel filter built into it and that's why they don't include a fuel line filter.
Yeah that does make sence but, I was hoping that putting the filter on the fuel line might capture any air and store it in the top of the filter. But if that would work ideally it would be a good idea to have some type of one-way valve on the presure line right. I know of a very small one that you would use to pump up say something like a football using a ordanary bicycle pump.