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Preparing the Required Information for Design

Follow the instructions below to help us help you.

Water Source Performance

It is important that you accurately measure the performance of your water source so we can accurately calculate how your system will perform during operation.

If you plan to use a pump you can refer to the pump manual which indicates the pressure and the flow available. If in doubt, share the pump specifications with your designer during consultation.

If you are planning to run your irrigation system from a mains water source (garden tap or direct connection), follow the instructions below to find the performance.

Calculate the Pressure and the Flow of your Water Source

Water Pressure

Water Pressure

(force exerted by water on a given surface)

Expressed in bar, it is measured using a pressure gauge connected to your water source. If you do not have a pressure gauge, you can purchase one here, or by visiting a local retailer that carries plumbing supplies. For an irrigation system to function correctly, you must have at least 1.5 bar of pressure.

Flow Rate

Flow Rate

(quantity of water provided during a given time)

Expressed in litres per minute, you can easily measure this with a large bucket. Simply take a bucket (it doesn't matter what size it is, but you need to know the volume to complete the calculation) and then time how long it takes to fill it up. From this exercise you will then be able to follow the formula below to determine the flow rate coming from your water source.

(Volume of container in litres ÷ Time to fill container in seconds) x 60 = Litres per minute

Draw a Map of your Garden

For this, you will need a sheet of paper, a tape measure, a pencil, a ruler, an eraser, a felt tip pen, and to follow the steps listed below.

  • Start with locating the house and the property line on the drawing.
  • Draw the paths, terraces, sheds, greenhouses and any other features.
  • Indicate the location of lawns, borders, flower beds, trees and shrubs.
  • Mark the location of the water source.
    Measure your garden accurately

    Measure your garden accurately

    • Measure the property boundaries, paths, lawns, flower beds, borders and everything else in your drawing. The more measurements you take, the easier planning is.
    • Count the number and locations of pots, containers, hanging baskets etc.
    • Note any notable features and obstacles for pipework, garden gates, ponds etc.

    Part of this process is to understand how much pipework is required, the fittings needed to navigate that pipework, and how many/what type of outlets are required. Being accurate with your measurements is crucial.

    Create a Scale Drawing

    Create a Scale Drawing

    After taking all the measurements of your garden, carefully transfer your rough drawing to graph paper. You can download some graph paper here and print it at home (ensure the scale is set to original size). Depending on the size of your garden, use one of the following scales:

    • 1 cm square= 0.50 metres (1 :50)
    • 1cm square= 1 metre (1:100)
    • 1 cm square= 2 metres (1 :200)

    Indicate those areas which are to be watered and which are not to be watered.

    For larger gardens, you will have to divide the system into several, smaller areas. This could be splitting the front and back gardens, or splitting the right hand side and left hand sides.

    With all of this information available, we can ensure your irrigation system will be as efficient as possible, delivering precise watering in a manner that is both not wasteful and exactly what your garden needs, meaning you can enjoy it all year round with, whatever the weather.

    What next?

    With all the information gathered, send it to us via email to review. If we need more information, we'll let you know.

    Irrigation Design Advice FAQ's

    The time it takes our team to complete a design varies depending on the complexity of the plan. Our team have been trained to the highest of standards by industry leaders and follow best practices to ensure every project completed is effective and efficient with water use. Achieving a finished irrigation design plan requires a thorough process that can take some time to complete. 

    During our peak period (April-July), the usual wait times are between 2 – 4 calendar weeks to receive a completed design. 

    Having a firm plan in place before beginning your irrigation installation is essential. Failure to plan could result in you purchasing an expensive system that does not perform as expected. Creating a plan will ensure you consider crucial aspects of the system, such as available flow rate and pressure, and helps to identify required zoning and pipe sizing.

    This question is difficult to answer, as many factors can influence a system’s cost. Smaller gardens will usually end up costing less than more extensive gardens. However,unusually shaped gardens may require more sprinklers and, therefore, cost more. To avoid disappointment, we recommend the following budgets. 

    Micro Irrigation Systems  

    Small Gardens - £100 - £600
    Large Gardens - £600 - £1200

    Pop-Up Sprinkler Systems  

    Small Gardens - £1000 - £2000
    Large Gardens - £2000 - £4000  

    We recommend having our team complete a full design for you to get an accurate cost for your garden. 

    For our team to accurately design an irrigation system, they first gather the necessary information, including the details of the water source performance and a detailed scale drawing of the area that requires irrigation. Our designers will then overlay the location of any irrigation emitters onto the drawing, including pop-up sprinklers and micro irrigation. Once the emitters are chosen and placed, the designer will use the water source information to determine the required zones for the optimal performance of the emitters. Once the zoning has been identified, details such as the necessary pipe sizing are calculated. The final step for the designer is to create a shopping list of all the components needed for installation.

    In short, yes. All the information is required for the designers to complete a design in full, so they will not begin if it is not present. We will let you know if we require more information when you have submitted a request.

    A water pressure measurement is not as crucial for micro irrigation systems. We assume it will be connected to a mains-supplied water source with at least 1 BAR pressure - the minimum required pressure for satisfactory performance of a micro irrigation system. If you have any doubt, speak to our team and they can assist you.

    Please don’t. Trying to guess the water pressure from your water source is like trying to guess the weight of an elephant; you’re probably going to get it wrong! The same goes for the dimensions of your garden or the flow rate. If you submit inaccurate information to our designers, you will get a flawed plan and, ultimately, a system that will fail to perform as expected. 

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