Sprinkler Selection Considerations Size of area Shape of
- Slides: 24
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 Lawn 12’ 1. Look up sprinkler types in your Rainbird catalog 2. Look up nozzle types
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? . 65 gpm 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 96. 3 X (Total gpm applied to the area) PR = Area covered For our lawn: PR = 96. 3 X (. 65 X 4) 12 X 12 = 96. 3 X 2. 6 144 = 250. 38 144 = 1. 74 inches per hour
Precipitation Rates
Design #2 Square Lawn (13’ X 13’) Soil type: loam 13’ 1. Look up sprinkler types in your Rainbird catalog 2. Look up nozzle types Lawn 13’ 3. Which one is the closest radius?
Design #3 Rectangle 24’ 12’ Lawn
Design #3 Rectangle 24’ 12’ Lawn
Design #6 Large Rectangle - Renovation 30’ Lawn 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 Where would you put those heads to have head to head coverage? 60’
Design #6 Large Rectangle - Renovation Lawn 30’ 60’