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    colbtech Posts: 740, Reputation: 65
    Senior Member

    Nov 30, 2018, 02:25 AM
    Glasshouse watering
    I have been asked to specify solenoid valves for a water project. I notice that many are normally closed/open with a voltage, and a spring return. My question is how good are these valve springs? Do they close tight? Do they fail and permit water to leak through?

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