Yes all you need to do is increase the pressure switch setting. That is as long as your new pump can build that much pressure. You don't want to get close to the "max" pressure that pump can build.( check the pump specs) Depending on which 1/2 HP you have, the max pressure might only be 60 PSI. Which means you don't want to set the pump to shut off any higher than about 55 PSI.