[meimk]

Those fuel pumps will run almost no pressure. Just about the same as gravity feed, probably less than1 lb of pressure at best. Open flow it will be just a small trickle. Keep in mind the pump runs on a pressure / vacuum pulse so the stream will pulse - not steady like an electric pump. You will never eliminate the air from the fuel filters If there is enough gas to fill as high as the outlet tube of the filter, it's enough.