I am looking for a source in the United States for a valve for controlling water flow.
1) For water usage 2) Differential pressure rating of 25 psi 3) 1/2"NPT or 3/4"NPT outlets or 3/8" or 1/2" barb fittings 3) Cost effective ($5-25 ea) 4) Arduino friendly. Meaning 5VDC, 12VDC or even 24VDC with a low average on-current (250mA). By average, either 250ma constant on or it may have a high turn-on current and 0mA on current.
Although this is not a water sprinkler application, I took apart a water sprimkler timer. It some type of valve that draw a bunch of current to turn on or off, but no current once in position. I have also found solenoid valves that draw current all the time when on. The undersized ones mean the current spec, but the outlet size is too small. If the outlet is the right size, the current is too high.
So let's put our heads together and list some places that have good cost effective valves that meet these specs.