What size pipe is needed to accept 45 gpm?

To determine the appropriate pipe size for accepting 45 gallons per minute (gpm), you can refer to flow rate charts that correlate flow rates with pipe diameters. Generally, for a flow rate of 45 gpm, a pipe size of 1.5 inches in diameter is often sufficient for standard applications, assuming typical water flow conditions. However, factors such as pipe material, length, and pressure drop requirements can also influence the final choice, so consulting with a Plumbing or engineering professional is advisable for specific applications.