It should all depend on the size of your drain. You want to push full capacity but NEVER exceed it.
There are calculators out there I just don't remember where. I think 1" handles around 350-400gph and
1.5" about 700gph.
Im running a larger pump!! but I am running the Pump/Sump from the basement with 12 ft head to the tank. Running a 1 in return line pump supposed to send 500 to 600 gph to tank at 12ft