Is Harvey Water softener compatible with Megaflow?

Hello, don’t know about Harvey ones, been using monarch water softeners for lint time, and they have an high flow kit (3/4 pipe connections) . We used that with 28 mm pipework, now it depends on the existing pipework , if it’s 15 mm main going inside the house it won’t . If you have bigger main, check if Harvey do an high flow kit . That won’t reduce the pressure.