Thanks for the info mrburns42. I was looking on Amazon because none of Menards, Home Depot, or Lowes have the irrigation stuff out on the shelves yet here in Minnesota. I still have about 24 inches of snow covering my garden and grass. I also signed up for Amazon Prime so two-day shipping is free and returns are super simple.
Regarding the current output, aren’t these valves a latching solenoid? With the OpenSprinkler Pi I should be able to turn them on and off and only draw current while the solenoid is in action, so does it matter how many are on at the same time? I was planning on powering my Raspberry Pi which I believe takes the same about of current anyway. So now I am just confused.