XERISCAPE: LANDSCAPING WITH STYLE in the ARIZONA DESERT

       


Draw Irrigation Design
Review your landscape plan before beginning the irrigation system design. Although it is possible to use a blank copy of your site plan, many people find it easier to draw the irrigation system design on a copy of their landscape plan.

1. Mark on your plan the point where you plan to tie in to the water line that goes to your house. This is usually done near the front yard hose bibb. Many new homes have a stub-out (a protrusion with an end cap) on the riser pipe connected to the hose bibb for this purpose. This is where the backflow preventer should be placed.

2. Mark the location of each emitter. Drip systems should be designed to accommodate the watering needs of mature plants. If you are not sure of the number and flow rate of emitters needed by each plant, the Drip Emitter Quantity Chart may be useful.

Sample Landscape Design

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Draw Existing Site
Learn About Plants
Learn About Materials
Draw Preliminary Plan
Design Irrigation System
Basic Components
Tips
Emitter Quantities
Draw Irrigation Design
Draw Final Design
Prepare Cost Estimate
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3. Using colored pencils, shade emitters that will be supplied by the same valve with the same color (for example: blue for trees, pink for shrubs, vines and groundcovers, yellow for planting beds, etc.).

4. Mark the location of the irrigation valves. They are usually placed next to the backflow preventer. Shade each valve to correspond with the colors you chose in Item 3.

5. Mark in the irrigation controller. Typically, it is installed next to an electrical outlet in the garage or by the breaker box outside.

6. Add the irrigation lines (PVC pipe/poly tubing), connecting them from the valves to the emitters. Make them the same color as the emitters they will serve. Use straight lines whenever possible to optimize the water flow. It might be necessary to use tees and elbows to direct irrigation lines to all of the planting areas. If you plan to use sleeves for running irrigation lines beneath hardscape or structures, mark their locations with a dashed line.

7. Then finish up by adding flush caps, which should be placed at the end of each pipe/poly tubing run.

This guide does not include instructions for designing and installing sprinkler systems generally used for lawns. If you are planning a lawn, learn as much as you can about sprinkler irrigation before adding this component to your irrigation system plan. Staff at local irrigation supply stores can be very helpful. Often, they can direct you to good reading materials, answer questions and offer advice.
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Sample Landscape Design

 
 
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