Sprinkler Selection Considerations Size of area Shape of area Water pressure Wind conditions Types of plants Available flows Slopes Soil type

Smaller Lawn Areas Pop up spray nozzles are versatile and require low pressures

Umbrella bubblers are good in a rose garden with basins dug around each rose bush Flow can be adjusted down to a trickle or up as an umbrella–like sheet of water Rose Gardens

Shrub heads Shrub heads are a cheaper alternative to pop ups spray heads and are generally used in low traffic areas like the back of planter areas

Slopes Slow applications rate sprinklers (rotary) sprinklers are best for slopes

Guidelines for Selection and Layout Design the system with as few heads as possible while still insuring uniform distribution over the area 1. Always place sprinklers in corners first 2. After corners place around obstacles 3. Along edges spraying inward 4. Fill in the remaining open spaces using the appropriate pattern

Head to Head Coverage = 50% of Diameter

Square Spacing - For areas with square edges

Rectangular Spacing – for windy areas 60% of diameter 40% of diameter Prevailing wind

Triangular Spacing – For irregular or curved areas

Corners first

Edges next

Finally, fill in the field

Design #1 Square Lawn 12’ Soil type: loam Look up sprinkler types in your Rainbird catalog Look up nozzle types 12’

Design #1 Square Lawn – Select Sprinkler type 12’ Nozzles: 12’Q (4) Rainbird 1804 series 4” pop up body (4) Lawn 12’

How much flow (gpm)will we need for these 4 sprinklers for this small lawn? .65gpm X 4 = 2.6 gpm Total gpm for this lawn This is the flow for the chosen nozzle at optimum minimum pressure

Design # 1 Square Lawn – What is the precipitation rate on this lawn? 12’ Lawn 12’

Precipitation rate PR = PR = 96.3 X (.65 X 4) 96.3 X 2.6 250.38 96.3 X (Total gpm applied to the area) Area covered PR = For our lawn: 1.74 inches per hour PR = 96.3 X (.65 X 4) 96.3 X 2.6 250.38 12 X 12 144 144 = = =

Precipitation Rates

Design #2 Square Lawn (13’ X 13’) Soil type: loam Look up sprinkler types in your Rainbird catalog Look up nozzle types 13’ Lawn 13’ 3. Which one is the closest radius?

Design #3 Rectangle 24’ Lawn 12’

Design #3 Rectangle 24’ Lawn 12’

Design #6 Large Rectangle - Renovation A Homeowner installed a system using 15’ MPR heads 30’ apart and asked you to fix the problem using the same type of heads and appropriate nozzles Lawn 30’ Where would you put those heads to have head to head coverage? 60’

Design #6 Large Rectangle - Renovation Lawn 30’ 60’