Sprinkler Zones / Spray head lawns
40 x 50 ft lawn sprinkler system, spray heads, 15 gpm at 65 psi
Pop-up spray heads placed head to head on a 40 x 50 ft lawn, on water that delivers 15 gpm at 65 psi (1 in service, good pressure).
Heads
Lawn size
What is on your plan
- The zone mapEvery head numbered, every zone in its own color, every pipe drawn with its size.
- The head scheduleEach head: zone, arc, nozzle and gpm.
- The pressure checkPressure left at the last head of every zone, after the backflow, the valve and the pipe.
- Parts and scheduleHeads, nozzles, valves, controller size, pipe by size in feet, wire, and minutes per station.
Checked before it is drawn
- Head to head: every spot of lawn gets water from at least two heads
- No zone draws more than three quarters of your water
- Pressure at the last head of every zone is enough for the heads
- No pipe carries water faster than 5 ft per second
Measure your water first
A pressure gauge on the outside faucet for psi, and a 5 gallon bucket and a stopwatch for gpm. Pick the plan at or below what you measure, never above. How to measure.
At the parts counter
This system
Rain Bird 1804 PRS pop-up spray head, 4 in (body)Pressure-regulated at 30 psi, so every nozzle throws its full 15 ft.Check the current priceThis system
Rain Bird 15VAN variable-arc nozzle, 15 ftOne nozzle for every arc: set it to 90, 180 or 360 degrees.Check the current priceEvery system
Rain Bird CP100 in-line valve, 1 inOne per zone, in a valve box near the house.Check the current priceEvery system
Rachio 3 smart sprinkler controller, 8-zoneRuns the schedule on the plan and skips watering when it rains.Check the current priceEvery system
3/4 in brass pressure vacuum breakerKeeps lawn water out of the house water; most codes require one.Check the current priceEvery system
Rain Bird ESP-TM2 controller, 8 stationsA simple dial-and-button controller for the schedule.Check the current priceEvery system
10 in round valve boxes, 3 packCovers the valves at grade so you can reach them.Check the current priceEvery system
18/5 sprinkler wire, 50 ftFrom the controller to the valves: one wire per zone plus a common.Check the current price
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