Do-It-Yourself Irrigation Inc.
Do-It-Yourself Irrigation Inc is your best source for Lawn Sprinklers, Lawn Irrigation Supplies, Irrigation Parts, Landscape Lighting, Well Pumps, Wire, Backflow Prevention, Pond and Lake Fountains as well as Irrigation and Landscape Lighting Design. and Instruction.

Rain Bird Lawn Irrigation;
21/31/41-51 Specs for Lawn Sprinklers.


Scroll down to learn about our line of Rain Bird 21/31/41-51 Impact Rotors,
or to order online from Do-It-Yourself Irrigation.

Rainbird 21/31/41-51 Series
Full-Circle Impact Rotor Pop-Up Sprinklers

Primary Applications:

Brass impact rotors with cast-iron or high-impact plastic cases for heavy-traffic, large turf applications.

 

Features and Benefits:

Cast-iron case on 47A for heavy-traffic areas.
High-impact plastic case on AP models.
Heavy-duty, brass pop-up assembly.
Proven impact drive for trouble-free operation and uniform water distribution.
Straight-through flow for excellent performance in dirty water.
Adjustable arc 20° to 340°.
Precision Jet tube (PJ™) minimizes side splash.
Inlet filter screen and flushing action protect internal assembly from debris.
Long-wearing TNT bearing.
Easy to rebuild and repair.
Diffuser screw on 27AP and 37AP models allows radius reduction up to 25% without changing nozzles.
Optional, two-piece rubber cover on all models for added safety.
Optional, internal Stopamatic® valve on 47A eliminates puddling and erosion caused by low-head drainage, saving water and money.

 

21AP Impact Rotors

English
Pressure (psi) Nozzle Radius (ft.) Flow (GPM) Precip (In/h) Precip (In/h)
40 8 41 2.8 0.16 0.19
9 42 3.5 0.19 0.22
10 * 43 4.4 0.23 0.26
11 43 5.3 0.28 0.32
50 8 42 3.2 0.17 0.2
9 43 3.9 0.2 0.23
10 * 44 4.9 0.24 0.28
11 45 5.9 0.28 0.32
60 8 43 3.5 0.18 0.21
9 44 4.3 0.21 0.25
10 * 45 5.4 0.26 0.3
11 46 6.5 0.3 0.34
70 8 43 3.8 0.2 0.23
9 44 4.6 0.23 0.26
10 * 45 5.8 0.28 0.32
11 47 7 0.31 0.35
80 8 44 4 0.2 0.23
9 45 4.9 0.23 0.27
10 * 46 6.2 0.28 0.33
11 47 7.5 0.33 0.38


Precipitation Rates based on half-circle operation.
Square spacing based on 50% diameter of throw.
Triangular spacing based on 50% diameter of throw.
* Standard Nozzle Size
Performance data collected in zero wind conditions.

Click here to view pricing or to place an order

31AP Impact Rotors

English
Pressure (psi) Nozzle Radius (ft.) Flow (GPM) Precip (In/h) Precip (In/h)
40 12 44 6.3 0.31 0.36
13 44 7.3 0.36 0.42
14 * 44 8.4 0.42 0.48
15 45 9.6 0.46 0.53
50 12 45 7 0.33 0.38
13 45 8.2 0.39 0.45
14 * 46 9.4 0.43 0.49
15 46 10.8 0.49 0.57
60 12 46 7.7 0.35 0.4
13 46 9 0.41 0.47
14 * 47 10.4 0.45 0.52
15 47 11.8 0.51 0.59
70 12 47 8.3 0.36 0.42
13 47 9.8 0.43 0.49
14 * 48 11.3 0.47 0.55
15 48 12.8 0.54 0.62
80 12 48 8.9 0.37 0.43
13 48 10.5 0.44 0.51
14* 49 12.1 0.49 0.56
15 49 13.7 0.55 0.63

Precipitation Rates based on half-circle operation.
Square spacing based on 50% diameter of throw.
Triangular spacing based on 50% diameter of throw.
* Standard Nozzle Size
Performance data collected in zero wind conditions.

Click here to view pricing or to place an order

41-51AP/41-51A/41-51A-SAM Performance

English
Pressure (psi) Nozzle Radius (ft.) Flow (GPM) Precip (In/h) Precip (In/h)
50 11 x 11 52 12.04 0.44 0.51
12 x 11 53 13.4 0.46 0.53
13 x 11 55 14.5 0.46 0.53
14 x 11 * 57 16.6 0.49 0.57
16 x 11 60 19 0.51 0.59
18 x 11.5 62 21.7 0.54 0.63
20 x 11.5 65 24.7 0.56 0.65
22 x 13 69 28.9 0.58 0.68
24 x 13 72 33.3 0.62 0.71
60 11 x 11 54 13.5 0.45 0.51
12 x 11 55 14.6 0.46 0.54
13 x 11 57 15.8 0.47 0.54
14 x 11 * 59 18 0.5 0.58
16 x 11 62 20.7 0.52 0.6
18 x 11.5 65 23.7 0.54 0.62
20 x 11.5 68 26.9 0.56 0.65
22 x 13 71 31.4 0.6 0.69
24 x 13 75   36.30 0.62 0.72
70 11 x 11 56 14.5 0.45 0.51
12 x 11 57 15.7 0.47 0.54
13 x 11 59 16.9 0.47 0.54
14 x 11 * 61 19.4 0.5 0.58
16 x 11 64 22.2 0.52 0.6
18 x 11.5 67 25.5 0.55 0.63
20 x 11.5 70 28.9 0.57 0.66
22 x 13 74 33.8 0.59 0.69
24 x 13 77 39 0.63 0.73
80 11 x 11 57 15.5 0.46 0.53
12 x 11 59 16.7 0.46 0.53
13 x 11 60 18 0.48 0.56
14 x 11 * 63 20.7 0.5 0.58
16 x 11 66 23.7 0.52 0.61
18 x 11.5 69 27.1 0.55 0.63
20 x 11.5 72 30.8 0.57 0.66
22 x 13 76 36 0.6 0.69
24 x 13 79 41.5 0.64 0.74
90 11 x 11 59 16.4 0.45 0.52
12 x 11 60 17.6 0.47 0.54
13 x 11 62 19.1 0.48 0.55
14 x 11 * 65 21.8 0.5 0.57
16 x 11 68 25 0.52 0.6
18 x 11.5 71 28.7 0.55 0.63
20 x 11.5 74 32.6 0.57 0.66
22 x 13 78 38.1 0.6 0.7
24 x 13 81 43.9 0.64 0.74
100 11 x 11 60 17.2 0.46 0.53
12 x 11 62 18.5 0.46 0.54
13 x 11 63 20.1 0.49 0.56
14 x 11 * 66 23 0.51 0.59
16 x 11 69 26.3 0.53 0.61
18 x 11.5 72 30.2 0.56 0.65
20 x 11.5 75 34.2 0.59 0.68
22 x 13 79 40 0.62 0.71
24 x 13 83 46.1 0.64 0.74

Precipitation Rates based on half-circle operation.
Square spacing based on 50% diameter of throw.
Triangular spacing based on 50% diameter of throw.
* Standard Nozzle Size
Performance data collected in zero wind conditions.

Click here to view pricing or to place an order

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Lawn Mowing Tips:

Check your soil acidity
The correct Potential of Hydrogen (PH) of your soil, is important for a green, healthy lawn