|I have installed sprinklers using 3/4|
|There are two options: you can redesign your system and split it into two zones instead of one, or you can consider using a different head or nozzle that requires less pressure. In severe low-pressure situations, a booster pump may be required. These can be expensive so I'd opt for either splitting the system into more zones or using a different type of sprinkler head.
Best wishes with your sprinkler system.