Sprinkler layout design with spray patterns

If you are looking for an alternative to a PVC system and need a simple to install in-ground system - designing and installing a DIY sprinkler system just might be easier than you think.

In this short tutorial you will learn how to create a simple garden plan and then estimate how much conduit and sprinkler heads you will need for your project.

Plotting your garden area

First, start by printing our graph paper. Depending on the size of your yard, you'll need to use the top and side ledger for reference, then refer to each square as 2 (or more) feet.

(see our printable graph paper for more)

Next, you will want to measure your lawn and draw any house walls or patio areas adjacent to it. Be sure to also include side walks, trees or garden borders too.

Locating your water source

Once you have define these areas and your garden boundary you will need to locate your outdoor faucets. Locate these on your plan with a large "X".

Choosing a sprinkler head

Now we're read to decide on what kind of sprinkler head to use. For this example we have selected Rotors. These are a rotating gear driven heads and are a great choice for large lawn areas and work well with Lawn Belt.

Note: Rotor heads silently spray a water stream out to an average distance of 20 feet. They will minimize the amount of conduit required for you project.

Drawing the spray patterns

Next, we will print the spray template. (see our pre-drawn sprinkler templates)

On the graph locate the rotors measuring 40 feet. Then cut each circle out with a pair of scissors.

Then we need to cut two of the sprays in and in half again if necessary for smaller areas. Since our Rotors allow adjustable spray angles from 40-360 degrees we can keep certain areas dry by spraying outward.

Tracing your spray patterns

Start with areas like the edge of house, patios or edge of street and use the half circles. With the spray templates simply trace around them using a pencil.

Each spray pattern should overlap at least 30% to ensure no areas in your lawn or garden will become dry. Once all half circles are drawn, fill in middle areas with full sprays and quarter spays where needed.

Defining your watering zones

Lastly, we need to draw in the conduit and create watering zones. Starting at your spigot, draw a gradual curve from one head to the next, trying to avoid overlapping the Lawn Belt. Be sure to avoid tight turns in your design.

With Lawn Belt we limit ourselves with 3 heads for each zone (4 heads can be added with adequate PSI and GPM). By connecting a series of 3 heads together you are establishing one watering zone or kit. Repeat this process to the remaining heads on your plan.

Checking your Psi and Gpm

You will also want to check your Psi and GPM levels. A call to your water company will give you a good idea of how good your water coverage will be if a gauge is not available.

We do recommend using a pressure gauge (it easily attaches to your faucet) and a gallon bucket (For example if it takes 7 seconds to fill a gallon bucket then divided 60 by 7 .. or 8.6 GPM) For more see our sprinkler design page .

Ready for the next step?

Continue to Step 4 - Select the Kit that fits.
Read 6 easy steps to a sprinkler system

Step 4 to Sprinkler System

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