Wait… what? Is it a 1-1/4" coupling or 1"???
Most items on Clearance are from Amazon overstock and aged inventory so we don’t have a lot of information on them.
I see some extra info and Q&A that may help you sort it out.
I think it would have a 1" line feeding through from the well to the house, with a side 1 1/2" line going to your pressure tank.