i have a question on my system that I am desinging. I have been using the Jess Stryker irrigation tutorial on the web and I have gotten as far as setting up the zones and determining how many heads to put on my zones. I have a 1 1/4 mainline coming into my valves and per the tutorial I could use a GPM of 23 becasue of this. However when I checked the flow out of a hose bib I only had 10 GPM. My question is would I be safe using the 23 GPM for my head and zone placement or should I fall back on t...
