Example Problem: Go online and choose a Goulds well pump suitable for a $300ft$ deep well, assuming $40$ at a shower head $25ft$ above the ground level. Since you will use a storage pressure tank system $($bladder$)$ assume a flowrate of $4-5gpm$ is adequate.. Note: the pipe size in the well will be determined by the pump outlet fitting size. The internal pipe in the house will be $\frac{1}{2}$ inch PEX, assume a $20ft$ friction head loss for fittings. Draw a diagram first! Calculate your system $H$ vs $Q$ curve! Combine this curve with the pump curve!