Here is what I know about Irrigation Valves, I have been a Landscaper for over 10 years and if you think about it; if have an irrigation system and the power is turned off dose the sprinklers turn on, no. All irrigation valves are 12v, if you ask me (i have never installed them for ballast so tuneman could be right) if you turn it on the water will come out, and turn it off the water will shut off. A different thought, if you what to use as a way to open an close like a valve, use the Calabria way. Two rv dump valves, this is a great way to fill ballast.
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