A 8m3/hr & 35m H pump is available with us and we are using for pumping organic residues which is the regular operation carried out in day today operation. Now we are planning to use the same pump for recirculation purpose for about 3 to 4 hrs/shift.But the recirculation back to the storage vessel pipe static head is only ~ 6 - 8 meters, but the original design of the pump is 35 m head. I have checked the pump curve & found that by reducing the actual head from 35 m to ~ 8 m , flowrate will increase. So accordingly I have sized the recirculation pipe size to the recommended velocity. Should this solve the problem? What other consequences might it have?