How many heads in a zone is too many

Discussion in 'Homeowner Assistance Forum' started by Andrew Reaves, Apr 8, 2020.

  1. Andrew Reaves

    Andrew Reaves LawnSite Member
    Messages: 11

    Hello All,

    brand new here. going to introduce myself after this. i have a 3 zone sprinkler system on a well in south florida.

    zone 1 has 23 sprinklers
    zone 2 has 20 sprinklers
    zone 3 14 sprinklers

    all zones have a mix of rotaries and spray heads. Majority are rotaries.

    All seem to have good pressure, but needing to add some more sprinklers for even coverage. Is there a way to test to see if there is enough pressure per zone?

    Thanks in advance
     
  2. sjwater

    sjwater LawnSite Member
    Messages: 52

    Basically maximum water flow into the zone must be equal or more than the water going out. So, pressure and pipe size sets the amount of available water for each zone. Water flowing out of the heads per zone needs to be equal or less than incoming water.

    There are plenty of manuals and guidelines out there, found these two if you care to read....

    https://www.hunterindustries.com/sites/default/files/design_guide_Residential_System_LIT-226-US.pdf

    https://www.rainbird.com/sites/default/files/media/documents/2018-02/IrrigationDesignManual.pdf
     

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