Irrigation Advice

Discussion in 'Irrigation' started by Kevin@Siteworks, Sep 26, 2001.

  1. Kevin@Siteworks

    Kevin@Siteworks LawnSite Member
    Posts: 16

    Alright Fellas....

    I tried a search but didn't find the info I wanted. Some relatives of mine want me to design/install an irrigation system. Just a few questions......
    The whole yard is about 20,000 sf. I'm going to renevate the front yard this fall followed by the back next year. Here are my questions....Should I tear out an redo the landscape before the irrigation goes in, or vice-versa? And do I install a valve for back yard now or tap into the supply line when the back yard is ready?
    Thanks in advance for any advice you guys can give me!
    Kevin
     
  2. If doing a drip system, just run the main stuff first(valves ect...)
    If you are going to put in plants or lawn, do the irrigation first. Just keep a layout handy of all your pipes.

    Basic, do the irrigation first, then the plantings.

    John
     
  3. Kevin@Siteworks

    Kevin@Siteworks LawnSite Member
    Posts: 16

    thanks for the info John...really appreciate the help.
     
  4. Hardy Enterprises

    Hardy Enterprises LawnSite Member
    Posts: 116

    I would agree with John. Do your irrigation before planting, but I feel you need to layout your beds before installing the irrigation. To irrigate properly you will need to irrigate you turf and bed areas seperately. Thus you will need differentiate where each of these area are before you can install your irrigation. Also if your planning on sodding don't forget to allow for the sod thickness on you sprayheads otherwise your heads will end up below grade.

    Jay
     
  5. HBFOXJr

    HBFOXJr LawnSite Bronze Member
    Posts: 1,712

    Get a good do it yourself design book like the one from Hunter Industries you can download on the web.

    Follow the directions.

    Follow the directions.

    If your gonna do a lotta ripping and tearing, do it all first. Then plant all or most of the landscape, do the sprinklers, then the lawn, mulch, little bed stuff last.

    You don't need seperate zones for beds and turf unless you must split sprays and rotors or shape and size configurations.
     
  6. smithsonmi

    smithsonmi LawnSite Member
    Posts: 75

  7. Kevin@Siteworks

    Kevin@Siteworks LawnSite Member
    Posts: 16

    Jay, Harold, Jim......thanks for the help and advice, I think I'm headed in the right direction now.......Kevin
     
  8. Hardy Enterprises

    Hardy Enterprises LawnSite Member
    Posts: 116

    Harold,

    Watering requirements for turf and bed areas are different. How are you going apply the correct amount of water to each if you don't distinguish between the two areas?

    Jay
     
  9. Lanelle

    Lanelle LawnSite Bronze Member
    Posts: 1,361

    Good Point, Jay. I see more dead shrubs from overwatering by irrigation systems. Many people keep the turf green at the expense of their shrubs. The water requirements certainly can be very different for shrubs compared to turf.
     
  10. HBFOXJr

    HBFOXJr LawnSite Bronze Member
    Posts: 1,712

    So does it rain differently on turf and beds? Of course not and you don't worry about it. Why? Because rain is evenly applied.

    The reality is that turf and beds don't have different watering requirements at all. The evapotranspiration rate is what it is for the landscape under given climatic conditions.

    What's different is the amount of root system under differnet plants and their access to available soil moisture.

    Not everything in a bed would have the same watering need under your premises, so where would it end?

    The key to irrigation is to replace what is lost daily through evapotranspiration via an eveny applied, measured amount of water.

    I've seen stuff overwatered more often because the turf and bed irrigation can't be adequately separated because of physical site and landscape configuration. Overlapping coverages of the 2 zones because it's imposssible to define a line and say this waters on this side and the opthe is watered by something else.

    Overwatering occurs when people design shoddy systems not using matched precipition nozzles, poor spacing, mixing sprays with rotors and poor layout yielding dry, uneven coverage that people try to overcome by running the sytem longer.

    Customers and many contractors don't know or understand precipitaion rates and evapotranspiration. Master those 2 things and you have control. Many people over or under water out of total ignorance because it's the easiest way.

    Design a system to mimick the eveness of rain and schedule operation accoeding to need and the need to separate areas is not a big issue.
     

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