I'm trying to figure out the maximum Flow GPM for my sprinkler system. On the sprinkler (Rainbird 1800 series) it shows a chart listing the PSI, the radius of the coverage area and the Flow GPM. For example, the bottom entry on a quarter circle sprinkler is listed at 30 PSI, 14' radius, and 1 GPM. Is this the maximum GPM the sprinkler will emit? If my PSI is 60, twice the PSI listed on the sprinkler, will it double the Flow GPM to 2?
My water line's PSI tested between 50 and 60, and the flow is 11.5 GPM. It seems like I'd have to install a lot of valves to keep the GPM within limits, and all for a very small lawn. :/