Hi Everyone - I'm interested in designing my own irrigation system, but I need some advice. Ideally, I'd like to hook up the system to my outside bib. My PSI is a steady 105, and my GPM is 5.25. My biggest question is, given this information, how many sprinkler heads can I have running on one valve? Also, if I had a plumber tap directly to the main service line, would my GPM increase? It just seems to me (without much knowledge on the subject) that my GPM at my outdoor faucet is low for how high my PSI is. Most conversion charts don't go up to 105 PSI so I really don't know how to figure this out!