That's what I'm talking about with the release valve plumbed back to the tank. It stops the clicking.
You don't need your irrigation to run constantly, if you just put it on a timer with short cycles. You can set the on time and off time to be whatever you want. If you do it that way, you don't have to hold pressure in a tank all the time, and it makes it all a lot cheaper. There are all kinds of cycle timers. The best ones look like a metal shoebox, with big metal mechanical gears inside, a couple hundred bucks. Cheap plastic ones tend to fail.
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