Can;t get gas up to carb

I talked to Van's yesterday. It is there new fuel tank and new sending unit. They had no answers for me. I checked the line again today, and there are no bends in it. The rubber line connecting the fuel tank to the line is brand new as is the 3/8 fuel line going to the front of the car. I can only imagine the new sending unit had some trash in it from the get go (brand new)?? I'm scratching my head on this one.