>>301994Just use a timer or follow what most of the people doing reviews have written and use a rain barrel. You can connect a swamp cooler float or a toilet float to a five gallon bucket and let the water weight from the bucket provide the pressure.
Or you could just tinker a bit until you're happy with it. Stuff like that dies in the sun here, I didn't think about one when I was thinking of a drip system. My garden is fairly large with lots of rows and I'll probably irrigate with grey pvc conduit and poly hose for connections and simple clamps like pic related on the poly hose for volume control. I want to put my system underground except where the water comes out and that'll be in the bottom of the rows. I'm not big on trip hazards.