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Thread: How to configure a drip zone? (control/timing)

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    Question How to configure a drip zone? (control/timing)

    I'm setting up a drip zone to water approximately 15 shrubs on the east side of my house. My irrigation system is fed directly from a well pump (no holding tank or anything like that).

    I'm not sure if it's OK to run that zone by itself since it will be low flow and high backpressure to the well pump. Will it be hard on the well pump if I do this?

    If I wire it up at the controller to run at the same time as one of the zones that waters the fescue, what about the timing? I would figure that a drip zone would need probably 30-45min? (My longest zone on the fescue is 20min, otherwise it runs off this damn clay soil.)

    Suggestions?

  2. #2
    Sprinkler Guy Wet_Boots's Avatar
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    Why must the zone be drip? You might be better off with sprays or bubblers.

    Or you could get low-flow drip, and run it concurrently with other zones, controller allowing.

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    In the Trades Bob NH's Avatar
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    You can configure the control system to run the drip zone when either of two regular zones is running.

    Designate primary zones A and B, and the drip zone as C.

    Connect the output of the controller to the coil of a double pole relay for each of zones A and B, but not to the valve. We will call them Relays A and B.

    Connect the coil for Valve A to one of the outputs of Relay A, and the coil of Valve C to the other output of the relay. Connect the power supply to the two poles of the relay.

    When the controller calls for water on Valve A it actuates the relay which applies power to both Valve A and Valve C.

    Do the same for the Valve B circuit, so when the controller actuates Valve B it is actuating the relay to Valve B, and when that relay is closed it actuates both Valve B and Valve C.

    You can extend that thought as far as you want.

    You may have a controller that does it all for you, but if you don't then it is easy to do it yourself.

  4. #4

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    Quote Originally Posted by Wet_Boots View Post
    Why must the zone be drip? You might be better off with sprays or bubblers.

    Or you could get low-flow drip, and run it concurrently with other zones, controller allowing.
    I don't want to do sprays; the well water is very hard and turns the mulch white.

    What's a bubbler? I didn't see anything like that at Lowes / Home Depot, but maybe they call it something else?
    Quote Originally Posted by Bob NH View Post
    You can configure the control system to run the drip zone when either of two regular zones is running.

    Designate primary zones A and B, and the drip zone as C.

    Connect the output of the controller to the coil of a double pole relay for each of zones A and B, but not to the valve. We will call them Relays A and B.

    Connect the coil for Valve A to one of the outputs of Relay A, and the coil of Valve C to the other output of the relay. Connect the power supply to the two poles of the relay.

    When the controller calls for water on Valve A it actuates the relay which applies power to both Valve A and Valve C.

    Do the same for the Valve B circuit, so when the controller actuates Valve B it is actuating the relay to Valve B, and when that relay is closed it actuates both Valve B and Valve C.

    You can extend that thought as far as you want.

    You may have a controller that does it all for you, but if you don't then it is easy to do it yourself.
    Thanks, I'll check this out!

    What kind of relays? Will I find them in the irrigation section (specific for this application?), or will I be selecting something from the electrical section?

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    Sprinkler Guy Wet_Boots's Avatar
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    Fifteen shrubs can be watered at a total zone rate of about 15 gallons per hour, using two 0.5 gph emitters per plant. That's a low enough flow rate to run concurrently with other zones, but if your controller doesn't allow for that, you might just get a second controller for the drip.

  6. #6

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    Is a 25psig regulator appropriate for this drip setup?

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