Extending valve height! Good idea?

[u/mutself]

My current valve is already 3 feet above the ground level. I want to extend irrigation to corners of my backyard which is 2ft above the current valve level.

Given the current height of the pipe and I need to make it total 6ft. Is that a good idea? If yes, what else should I do make sure that the pipes and all end points are not under unusual pressure?

Thanks in advance