Variable Speed Pump VS 3050---gpm/rpm?

[chem geek]

Thanks, I had seen that graph but what is my TDH?

TDH is Total Dynamic Head, usually expressed in feet (of water). Dynamic head is the resistance (pressure) associated with water flowing in pipes and through inlets/outlets. Static Head is pressure associated with an elevation difference though usually this is canceled out between the suction and pressure sides of the pump. Static head is more relevant for whether you can prime the pump or to raise water to a solar panel on a high roof.