Thanks everyone for your replies. I will try to address each below. I apoligize if I miss anything.
1) Axial flow will collects rags too easily
2) Pump suppliers are not much help with this since the configuration demands a low head/high discharge pump and there do not seem to be many, if any...
On one of our facilities we have an influent well fed by force main with discharge handled by a submersible pump. The pump wears out frequently due to running too much. From the elevation at which the pump takes in influent to that elevation at which the influent discharges downstream is 4'...
