Do you know the optimal pressure for an irrigation system?

Most people don't but its around 45 psi. Irrigation systems are best designed around that figure and flow. Many parts of Atlanta have water pressure that exceeds 100 psi so be sure that when you get your new irrigation system estimate that you ask what your water pressure is and about a pressure regulator which will save you problems later.

High (or low) irrigation system water pressure

High pressure blowing out your heads, valves? Do your irrigation system heads spray a mist? If your sprinkler heads are misting that means that the water isn't reaching your sprinkler heads at the best possible water flow rate. Low water pressure can keep your irrigation system from giving good coverage too. There are many solutions to try a regular pressure regulator helps the best in many situation to regulate the water pressure on the entire system and should be used in high pressure situations. Heads with pressure regulating stems help with the misting and are fairly inexpensive. Rotary nozzles can help distribute water more effectively in low flow situations as well as valves with flow control can help in situations with varied landscapes.