Variable flow dripper?

Discussion in 'HortForum' started by sgbotsford, Feb 21, 2020.

  1. sgbotsford

    sgbotsford Active Member

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    Location:
    Rural Edmonton Alberta area, Canada
    I have a mixed species plantation, where trees are replaced at irregular intervals. I need a non-pressure compensating adjustable dripper. Max flow 12-16 liters per hour, min flow zero. (0 to 4 gph)



    I can do this from 1 to 4 by using flag emitters and changing the flag part. But no one makes a 0gph flag.



    The emitter has to be cleanable.
     
  2. vitog

    vitog Rising Contributor 10 Years

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    Location:
    Burnaby, Canada
    I don't anything about drippers; but, if nothing else is available, you could use a progammable water timer to turn off the water line when you want the dripper to go to zero.
     
  3. sgbotsford

    sgbotsford Active Member

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    Location:
    Rural Edmonton Alberta area, Canada
    Alas I am not about to install thousands of programable timers.

    I do use timers a lot. A zone typically is 300 to 600 1 gph drippers or a single 100 gph sprinkler. My water supply will run 3 sprinklers or 1 drip zone at a time. I try to do all my sprinkling between 5 a.m. and noon, as there is less evaporation loss, and everything is dry by mid afternoon. Less mildew.

    Picture this: 60 short rows of 10 trees each in my display area. 3 trees get sold. Their drippers now will run onto the ground when the zone is watered.

    Picture this: Parkland pillar birch is popular this year, so I double up the jack pine and the siberian larch and run 2 rows of PPbirch. So now all the 1 gph drippers have to become 2 gph drippers

    According to my inventory between trees here, and trees arriving this spring I have 51860 trees. About 2/3 are little guys under sprinklers. Still means a lot of drippers.
     

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