better get the towels, mops and bucket out. But, if power goes out, the water will flow. But, then again, you could go that way if you wanted to. Having a solenoid valve that STOPS water flow when power is ON could be inefficient - ie. It also serves the purpose for times when an irrigation pump breaks down - giving the option to use 'town water', rather than river/bore water for irrigation. Like somebody indicated already - a manual (hand turnable) bypass valve added to the irrigation system allows you to use the water if there is a power outage. When electrical current is provided from the panel, the solenoid valve opens and relieves water pressure from the deluge valve push rod chamber or diaphragm.
wants to do it mechanically can someone suggest me some solutions for it? If there is an alternative I can use for the flow purpose, which can give us water with power and without power I want to use a Solenoid valve for my project, the valve will be used for water in which is facing one problem if there is no power, how can we get water from the valve, I don't want to add any kind of batteries in the project.
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