designing Drip for Trees on a 1 horse pump

Discussion in 'Irrigation' started by Cape Atlantic Landscaping, Aug 6, 2013.

  1. Cape Atlantic Landscaping

    Cape Atlantic Landscaping LawnSite Member
    Posts: 37

    Hello,

    I get a phone call from a friend who is a fellow Landscaper and he asks me to help him

    Scenario
    1. Home owner has a non irrigated area about 1/2 acre that has 12 smaller ornamental trees that need to be irrigated with drip. he would like to tie into existing sprinkler system that is used for front and sides of house that is irrigated. he would like to use drip line tubing like Techline . 9 gpm 12 inch spacing and wrap a couple of lines around each tree. The existing system is tied into a 1 horse submersible pump at a rate of probably 18 GPM and a Static of 65 Psi.
    My question is how do you do this with out the pump cycling on and off.
    2. the easy solution which I have been guilty of before was just tie it into an existing zone. I also had the idea of adding a spray head or two to the new drip zone to get the proper flow so the pump don't cycle.
    Thank you for your knowledge and expertise
     
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,372

    How large are the trees? One possibility, besides forgetting drip and installing an overkill-watering zone of spray heads just for the trees, would be low-flow drip connected to the system mainline, making every zone water the trees as well - additional water use would be a fraction of a gallon per minute.
     
  3. Cape Atlantic Landscaping

    Cape Atlantic Landscaping LawnSite Member
    Posts: 37

    the trees are stunted they are about 14 to 15 ft. high and 2 to a 3 inch caliper.The home owner is asking to have this on its on zone so he can turn it on when he wants to. Yeah I know customers want it all.

    2. Back round my company planted the trees about 12 years ago for the home owner and we worked for them previously but had to leave due to customer being difficult. My friend has since picked up the account and was asked to do these trees
     
  4. irritation

    irritation LawnSite Gold Member
    Posts: 3,222

    If the pump is controlled by a pressure switch and the tank is sized correctly, it should not cycle much with drip. You will of course need a pressure regulator and filter for the drip zone.
     
  5. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,372

    Low-flow drip would cycle on its own zone, while run alone, but, as mentioned, the time period of the cycling would be so long that the pump wouldn't suffer.

    The controller might need to be changed, if the drip zone would run concurrently with a lawn zone.

    The zone valve for low-flow drip might be an issue. Special zero-minimum-flow valves exist, but are probably special order.
     
  6. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,334

    Cycle Stop Valve.
     
  7. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,372

    I would never modify a domestic well water supply for my irrigation convenience, short of pressure switch tweaking. Dedicated irrigation well maybe, but they aren't all that common 'round here.
     
  8. irritation

    irritation LawnSite Gold Member
    Posts: 3,222

    I don't know why. They work fine on domestic water supplies with the same or higher pressure.

    http://store.rainbird.com/product/detail/X10306.aspx
     
  9. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,372

  10. greenmonster304

    greenmonster304 LawnSite Gold Member
    Posts: 3,076

    The cycle stop would work. I have installed them for the same reason.
     

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