My 2.4 total HP single speed pump is dying and I'm replacing it with a Pentair IntelliFlo VS. The single speed runs at 3450 RPM.
Short of flowmeters before and after is there a way for me to get an idea of what RPM on the Pentair gets as much circulation as my old pump?
* My pump directly proceeds my sand filter, so is PSI there an indicator of flow rate?
* The Pentair is listed at 3.95 total HP, so can I expect that 3450 RPM * 2.4 / 3.95 on the Pentair is equivalent flow?
I hope to run most of the time at much lower RPMs, but like how the skimmers, spa, etc. work now and would like to replicate that.