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Cdairrtech
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The info you will need to know to make this work are:
- what is the elevation difference between the pump and where the heads and valves are? 5-6 ft at the highest which is also the farthest point
- what will the water pressure and volume be at that elevation? You will need to find the pump curve of that pump to know. Otherwise, you will need to run the line up the hill, stick a tee on the end with a manual valve on one side and a pressure gauge on the other. Flip the pump on, start cracking the valve and open till the pressure drops to the target min pressure. That will be your dynamic or working pressure when the system is on. You can then time how long it takes to fill a marked container like a five gallon bucket to know your GPM at that desired pressure, but design your system to use a little less GPM than what you find. Here is the link to the pump info... http://www.redlionproducts.com/lawn-irrigation/centrifugal-self-priming-sprinkler-pumps/
- what is the size of the area you want to water? Once you know how big the area is you want to water, you will be able to select the proper sprinklers. about 150' x 150'
- what size pipe? This ultimately is determined by your pump output. 1 1/2" pipe from your pump to your valves sounds like a good plan but from there, unless you have a gigantic yard, it makes sense to stick with 1" valves and pipe. The cost would get driven way up to move up to 1 1/2" , as well as difficulty of installation. Plus, if your pump only puts out 15 GPM, there is no reason for 1 1/2". This will also determine how many sprinklers and what GPM you can use on each zone. Exactly what I am trying to figure out...
- How many sprinklers and what nozzles will they use? Once you know the area, how many sprinklers and what nozzles, you can then start splitting things up to fit how many GPM you have. This will dictate the minimum valves you will need. You can split it up further for more control over potential problem areas with more valves.
Going online to some of the manufacturer websites will let you look at all the specs of their heads. About 30 sprinklers, not sure which ones.
Hope this helps line it out a little.