I have installed an irrigation system over a wide area and found that the water pressure is insufficient to fully power the entire area. Is there something that can be added to the tap outlet so as to increase pressure?

I have installed an irrigation system over a wide area and found that the water pressure is insufficient to fully power the entire area. Is there something that can be added to the tap outlet so as to increase pressure?
Did your check what your flow rate capabilty is on the main? What your pressure?. the best way is to divide them into zones... the big box stores do have free and good information on sprinkler lay out... to increase pressure you need a pump, but you may not have enough flow(still have to zones them)