I'm designing a more permanent tree irrigation system for my property to replace the makeshift only I currently have that uses garden hoses. To water the trees, I've settled on non-pressurized lines that are open at the ends (to eliminate the problem of clogging, as we have extremely hard water). To ensure that the flow isn't too high, I need a way to reduce the flow so it just dribbles out. To do this right now, I just open my hose bib spigot a tiny bit so the flow is extremely low, and it works fine. However, this means I can't run the sprinkler at the same time.
For the system I'm designing, I want to preserve the high pressure high flow at the hose bib so I can run the sprinkler (high flow, high pressure) at the same time as the dribbly tree irrigation part (low flow, low pressure). I have not had much luck finding a product or method to accomplish this. How can I reduce the flow and pressure for only one of the lines? I almost feel like what I want to do is add another hose bib, or a shut-off valve that uses a globe valve instead of a ball valve. I want to be able to throttle the flow, basically.