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Design your Sprinkler System

How to begin Designing your system

Suggested planning tools: Pencil, scratch paper; Drawing compass; 50' tape measure; Straight edge or ruler; Marking spray paint for marking trenches; Toro Flow & Pressure Gauge. (Note: If you do not own a Flow & Pressure Gauge, ask your local Toro retailer if they have one that they loan to customers.)

1 Draw Your Property From A Birds Eye View.

Using your tape measure, outline and measure your property accurately according to scale, laying out the locations of your home, sidewalks, grass, etc.

  1. Outline your house, garage, other building.

  2. Show walks, drives, slabs, patios and surfaces.

  3. Locate and identify trees and major obstacles.

  4. From the outside of the house, measure outward to define your outside perimeters.

  5. Locate ground cover, grass and flower beds.

  6. Identify the location of the water meter (or pump) and service line.

  7. Re-check your measurements at several different points. Make sure your drawing accurately indicates the true dimensions.

2 Section Your Yard.

Divide your yard into areas, according to type of plant material (grass, shrubs, etc., or shade versus sun.) Create as many large rectangles as you can, saving small and oddly-shaped areas for last.

3 Locate Sprinklers In Large Rectangular Areas First.

Locate sprinklers within each areas, one area at a time, using larger sprinklers for larger areas. Stay within the allowable spacing range (radius) and remember to space them "head to head." Spacing head too far apart will produce dry spots. Always place sprinklers in a way that avoids spraying the side of your house, walls, wood fences, etc. Also, minimize spraying onto sidewalks, driveways, and streets. Place half-circle heads on sides and borders; quarter circle head in corners; and full circle heads in the middle.


Lawn and Sprinkler Layout
Use a Compass for Correct Head-to-Head Spacing
Please note: Locating sprinkler heads is not an exact science. You can locate sprinkler heads without knowing pressure or the gallons per minute (G.P.M.) flow rate of water. Click here for information on finding the G.P.M. for your system. These factors will apply later when we divide the system into zones. For now, work on your layout as described in Step 3 until you've achieved head-to-head coverage for all areas.

Complete your sprinkler placement
After locating your sprinklers in large, rectangular areas, you can now locate sprinklers in small non-rectangular areas. Although each situation is different, following are some handy guidelines.

    Complete Your Sprinkler Placement

Locating Sprinklers in Oddly-Shaped Areas:

  1. Pick the spot on the perimeter with the smallest radius.

  2. Place a head with a small radius at that point.

  3. Place heads along the border starting from that spot.

  4. Adjust the radius of each head according to the size and shape of the area.

  5. If coverage is incomplete, adjust sprinkler location.

  6. If coverage is still incomplete, start over, using a head with a larger radius.

Here are two way to locate sprinklers in small areas.

Areas such as narrow strips bordering your driveway or sidewalk can be watered by two offset rows of part-circle heads as shown here. (Two rows of part-circle heads)

Or you can use special pattern heads for end-strip and center-strip watering as shown in this diagram below.

(Center-strip heads spray in two directions: end-strip heads spray in one direction only. Both are designed for precise watering of small rectangular areas.)

When you have located all of your sprinkler heads, use your compass to double-check your layout. Be sure coverage is head-to-head.

Now zone your system.

Information found here supplied by Toro.