Irrigation Product Listings & Reviews

Rainbird Spray Nozzles

Rainbird Nozzles for Spray Type Sprinkler Bodies

Description:

These nozzles fit the 1800 series and UNI-Spray series sprinkler head bodies. They will also fit onto most other brands of sprinklers that use universal female thread nozzles. While Rainbird makes a wide range of nozzles, most are only available at specialty irrigation stores. Hardware stores and home centers tend to only carry a few of the most common nozzles.

Rainbird makes a very good nozzle set with good water spray uniformity. Many of them have matched precipitation rates so you can mix different radius and pattern nozzles on the same valve zone without messing up the water application uniformity. Be careful of this as Rainbird's literature calls all of their nozzles "matched precipitation rate", but that does not mean they are all compatible with each other! For example, you should not use a 4 series VAN nozzle on the same valve circuit as a 5 series MPR nozzle. Read the nozzle descriptions for each series of nozzles below for details on which nozzles are compatible.

The spray radius can be reduced up to 25% on all but a few specialty bubbler nozzles using a screw on top of the nozzle. Note that the separate screen must be installed under the nozzle for the radius adjustment to work correctly. If you remove or don't install the screen you won't be able to adjust the radius. The screens are provided with the nozzles when you purchase them. All Rainbird nozzles are constructed of high-quality plastic.

Features:

Performance Data

Quick links to:
Fixed Arc MPR Series Nozzles
Adjustable Arc VAN Series Nozzles
Undercut Series Nozzles
Stream Spray Series Nozzles
Stream Bubbler Series Nozzles
Rotary Series Nozzles
Brass Series Nozzles
PCS Screens

Fixed Arc MPR Nozzles:

These are the most common nozzles, and are the ones found pre-installed on the consumer line of spray heads sold in many hardware and big-box stores.

All of these MPR nozzles have matched precipitation rates. For example you can mix a 5 Series MPR, a 8 Series MPR and a 15 Series MPR nozzle together on the same valve circuit. You can also mix 12 Series VAN, 15 Series VAN, 18 Series VAN, and Undercut Nozzles Series together with any of the MPR nozzles on the same valve circuit.

The following nozzle series are NOT compatible with the MPR nozzles and should not be used on the same valve circuit with them: Do not use 4 VAN, 6 VAN, 8 VAN, 10 VAN, Rotary Nozzles, Stream Spray Nozzles, or the Brass Nozzles.

5 Series MPR

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	5F	2' - 0.09 GPM	3' - 0.19 GPM	4' - 0.27 GPM	5' - 0.41 GPM
	5H	2' - 0.04 GPM	3' - 0.09 GPM	4' - 0.13 GPM	5' - 0.20 GPM
	5T	2' - 0.03 GPM	3' - 0.06 GPM	4' - 0.09 GPM	5' - 0.13 GPM
	5Q	2' - 0.02 GPM	3' - 0.05 GPM	4' - 0.07 GPM	5' - 0.10 GPM

 

8 Series MPR

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	8F	5' - 0.54 GPM	6' - 0.75 GPM	7' - 0.82 GPM	8' - 1.05 GPM
	8H	5' - 0.27 GPM	6' - 0.38 GPM	7' - 0.41 GPM	8' - 0.52 GPM
	8T	5' - 0.18 GPM	6' - 0.25 GPM	7' - 0.27 GPM	8' - 0.35 GPM
	8Q	5' - 0.13 GPM	6' - 0.19 GPM	7' - 0.21 GPM	8' - 0.26 GPM

 

10 Series MPR

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	10F	7' - 1.16 GPM	8' - 1.30 GPM	9' - 1.44 GPM	10' - 1.58 GPM
	10H	7' - 0.58 GPM	8' - 0.65 GPM	9' - 0.72 GPM	10' - 0.79 GPM
	10T	7' - 0.39 GPM	8' - 0.43 GPM	9' - 0.48 GPM	10' - 0.53 GPM
	10Q	7' - 0.29 GPM	8' - 0.33 GPM	9' - 0.36 GPM	10' - 0.39 GPM

 

12 Series MPR

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	12F	9' - 1.80 GPM	10' - 2.10 GPM	11' - 2.40 GPM	12' - 2.60 GPM
	12TQ	9' - 1.35 GPM	10' - 1.58 GPM	11' - 1.80 GPM	12' - 1.95 GPM
	12TT	9' - 1.20 GPM	10' - 1.40 GPM	11' - 1.60 GPM	12' - 1.74 GPM
	12H	9' - 0.90 GPM	10' - 1.05 GPM	11' - 1.20 GPM	12' - 1.30 GPM
	12T	9' - 0.60 GPM	10' - 0.70 GPM	11' - 0.80 GPM	12' - 0.87 GPM
	12Q	9' - 0.45 GPM	10' - 0.53 GPM	11' - 0.60 GPM	12' - 0.65 GPM

 

15 Series MPR

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	15F	11' - 2.60 GPM	12' - 3.00 GPM	14' - 3.30 GPM	15' - 3.70 GPM
	15TQ	11' - 1.95 GPM	12' - 2.25 GPM	14' - 2.48 GPM	15' - 2.78 GPM
	15TT	11' - 1.74 GPM	12' - 2.01 GPM	14' - 2.21 GPM	15' - 2.48 GPM
	15H	11' - 1.30 GPM	12' - 1.50 GPM	14' - 1.65 GPM	15' - 1.85 GPM
	15T	11' - 0.87 GPM	12' - 1.00 GPM	14' - 1.10 GPM	15' - 1.23 GPM
	15Q	11' - 0.65 GPM	12' - 0.75 GPM	14' - 0.82 GPM	15' - 0.92 GPM

 

15 Strip Series (MPR compatible)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	15SQ	18'x18' - 2.68 GPM	19'x19' - 3.06 GPM	21'x21' - 3.42 GPM	23'x23' - 3.73 GPM
	15EST	4'x13' - 0.45 GPM	4'x14' - 0.50 GPM	4'x14' - 0.56 GPM	4'x15' - 0.61 GPM
	15CST	4'x26' - 0.89 GPM	4'x28' - 1.00 GPM	4'x28' - 1.11 GPM	4'x30' - 1.21 GPM
	15SST	4'x26' - 0.89 GPM	4'x28' - 1.00 GPM	4'x28' - 1.11 GPM	4'x30' - 1.21 GPM
	9SST	9'x15' - 1.34 GPM	9'x16' - 1.47 GPM	9'x18' - 1.60 GPM	9'x18' - 1.73 GPM

Adjustable Arc Nozzles:

Adjustable arc nozzles are very useful for those hard to fit areas. Rainbird's VAN nozzles are very good, however most professionals prefer to use variable arc nozzles only in locations where a standard fixed arc will not work. There are several reasons for this. Variable arc nozzles cost slightly more than fixed arc nozzles. Variable arc nozzles have more parts, and thus more to break or wear. And finally, variable arc nozzles can sometimes loose their adjustment and need to be readjusted to make sure the arc is still correct. I think a time is coming when the majority of spray head nozzles sold will be the variable arc type.

The 12 Series VAN, 15 Series VAN and 18 Series VAN have matched precipitation rates and you can mix all 3 together on a single valve circuit. However the 4, 6, and 8 series should not be mixed with other series. For example if you use the 4 series you should not use any other series of nozzles on the same valve circuit. The same rule applies for the 6 and 8 series.

4 Series VAN Nozzles (Adjustable Arc, not MPR)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	330 Arc	3' - 0.62 GPM	3' - 0.70 GPM	4' - 0.80 GPM	4' - 0.88 GPM
	270 Arc	3' - 0.52 GPM	3' - 0.58 GPM	4' - 0.66 GPM	4' - 0.73 GPM
	180 Arc	3' - 0.32 GPM	3' - 0.37 GPM	4' - 0.41 GPM	4' - 0.45 GPM
	90 Arc	3' - 0.21 GPM	3' - 0.24 GPM	4' - 0.26 GPM	4' - 0.29 GPM

6 Series VAN Nozzles (Adjustable Arc, not MPR)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	330 Arc	4' - 0.85 GPM	5' - 0.96 GPM	5' - 1.09 GPM	6' - 1.20 GPM
	270 Arc	4' - 0.79 GPM	5' - 0.88 GPM	5' - 1.00 GPM	6' - 1.10 GPM
	180 Arc	4' - 0.42 GPM	5' - 0.49 GPM	5' - 0.55 GPM	6' - 0.60 GPM
	90 Arc	4' - 0.26 GPM	5' - 0.30 GPM	5' - 0.34 GPM	6' - 0.37 GPM

8 Series VAN Nozzles (Adjustable Arc, not MPR)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	330 Arc	6' - 1.21 GPM	7' - 1.36 GPM	7' - 1.55 GPM	8' - 1.70 GPM
	270 Arc	6' - 1.11 GPM	7' - 1.24 GPM	7' - 1.41 GPM	8' - 1.55 GPM
	180 Arc	6' - 0.84 GPM	7' - 0.97 GPM	7' - 1.09 GPM	8' - 1.19 GPM
	90 Arc	6' - 0.51 GPM	7' - 0.59 GPM	7' - 0.66 GPM	8' - 0.72 GPM

10 Series VAN Nozzles (Adjustable Arc, not MPR)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	330 Arc	7' - 1.93 GPM	8' - 2.32 GPM	9' - 2.52 GPM	10' - 2.60 GPM
	270 Arc	7' - 1.45 GPM	8' - 1.75 GPM	9' - 1.89 GPM	10' - 2.10 GPM
	180 Arc	7' - 0.97 GPM	8' - 1.20 GPM	9' - 1.26 GPM	10' - 1.45 GPM
	90 Arc	7' - 0.48 GPM	8' - 0.58 GPM	9' - 0.63 GPM	10' - 0.75 GPM

12 Series VAN Nozzles (Adjustable Arc, MPR compatible)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	330 Arc	9' - 1.80 GPM	10' - 2.10 GPM	11' - 2.40 GPM	12' - 2.60 GPM
	270 Arc	9' - 1.35 GPM	10' - 1.58 GPM	11' - 1.80 GPM	12' - 1.95 GPM
	180 Arc	9' - 0.90 GPM	10' - 1.05 GPM	11' - 1.20 GPM	12' - 1.30 GPM
	90 Arc	9' - 0.45 GPM	10' - 0.53 GPM	11' - 0.60 GPM	12' - 0.65 GPM

 

15 Series VAN Nozzles (Adjustable Arc, MPR compatible)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	330 Arc	11' - 2.60 GPM	12' - 3.00 GPM	14' - 3.30 GPM	15' - 3.70 GPM
	270 Arc	11' - 1.95 GPM	12' - 2.25 GPM	14' - 2.48 GPM	15' - 2.78 GPM
	180 Arc	11' - 1.30 GPM	12' - 1.50 GPM	14' - 1.65 GPM	15' - 1.85 GPM
	90 Arc	11' - 0.65 GPM	12' - 0.75 GPM	14' - 0.82 GPM	15' - 0.92 GPM

 

18 Series VAN Nozzles (Adjustable Arc, MPR compatible)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	330 Arc	14' - 4.21 GPM	15' - 4.70 GPM	17' - 4.86 GPM	18' - 5.32 GPM
	270 Arc	14' - 3.16 GPM	15' - 3.52 GPM	17' - 3.65 GPM	18' - 3.99 GPM
	180 Arc	14' - 2.11 GPM	15' - 2.35 GPM	17' - 2.43 GPM	18' - 2.66 GPM
	90 Arc	14' - 1.05 GPM	15' - 1.17 GPM	17' - 1.22 GPM	18' - 1.33 GPM

Undercut Nozzles:

Undercut nozzles have a second narrow water slit (orifice) under the primary nozzle outlet. This slit sprays a small fan of water close in to the head to give better water application uniformity. Many of the older brass sprinklers had undercuts, but they disappeared with the arrival of plastic nozzles because the small undercut slits were difficult to mold into the plastic. New technology has now corrected that problem. The primary disadvantage of undercut nozzles is that the undercut slit is so tiny it rapidly becomes clogged with mineral deposits or debris. Plastic nozzles have less mineral build-up problems than brass because the mineral deposits tend to flake off of the oily plastic surface. If you want the best possible coverage then undercut nozzles are the answer. The trade off is going to be higher maintenance costs.

The Rainbird undercut nozzles have matched precipitation rates with the 12 Series VAN, 15 Series VAN, 18 Series VAN, and any of the MPR nozzles. You can mix any of these together on the same valve circuit. U-Series nozzles are not recommended for use on 2" or 3" pop-up bodies. Use a higher pop-up height.

U12 Series Nozzles (MPR compatible)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	U-12F	9' - 1.80 GPM	10' - 2.10 GPM	11' - 2.40 GPM	12' - 2.60 GPM
	U-12TQ	9' - 1.35 GPM	10' - 1.58 GPM	11' - 1.80 GPM	12' - 1.95 GPM
	U-12TT	9' - 1.20 GPM	10' - 1.40 GPM	11' - 1.60 GPM	12' - 1.74 GPM
	U-12H	9' - 0.90 GPM	10' - 1.05 GPM	11' - 1.20 GPM	12' - 1.30 GPM
	U-12T	9' - 0.60 GPM	10' - 0.70 GPM	11' - 0.80 GPM	12' - 0.87 GPM
	U-12Q	9' - 0.45 GPM	10' - 0.53 GPM	11' - 0.60 GPM	12' - 0.65 GPM

U15 Series Nozzles (MPR compatible)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	U-15F	11' - 2.60 GPM	12' - 3.00 GPM	14' - 3.30 GPM	15' - 3.70 GPM
	U-15TQ	11' - 1.95 GPM	12' - 2.25 GPM	14' - 2.48 GPM	15' - 2.78 GPM
	U-15TT	11' - 1.74 GPM	12' - 2.01 GPM	14' - 2.21 GPM	15' - 2.48 GPM
	U-15H	11' - 1.30 GPM	12' - 1.50 GPM	14' - 1.65 GPM	15' - 1.85 GPM
	U-15T	11' - 0.87 GPM	12' - 1.00 GPM	14' - 1.10 GPM	15' - 1.23 GPM
	U-15Q	11' - 0.65 GPM	12' - 0.75 GPM	14' - 0.82 GPM	15' - 0.92 GPM

Stream Bubbler Nozzles:

Stream bubblers shoot water out in small streams. The Rainbird stream bubblers are pressure compensating, that is, they deliver the same amount of water regardless of the pressure. The purpose of a bubbler is to flood the water onto the soil surface around the bubbler, where it creates a small puddle. Bubblers should be used in level ground areas only. Note that the area watered depends greatly on the soil. Sandy soils allow the water to quickly soak in and a smaller area is wetted. Clay soils resist the water infiltration and the water spreads over a larger area. It is advisable to buy a sample bubbler of the size you want to use and attach it to the end of a hose so you can test it on your soil and see how much area will be actually watered.

Bubbler nozzles are not compatible with any of the other spray nozzles and should not be installed on the same valve circuit with the others.

5 Series MPR Stream Bubbler Nozzles

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	5F-B 6 streams	5' - 1.50 GPM	5' - 1.50 GPM	5' - 1.50 GPM	5' - 1.50 GPM
	5H-B 4 streams	5' - 1.00 GPM	5' - 1.00 GPM	5' - 1.00 GPM	5' - 1.00 GPM
	5CST-B 2 streams	5' - 0.50 GPM	5' - 0.50 GPM	5' - 0.50 GPM	5' - 0.50 GPM
	5Q-B 2 streams	5' - 0.50 GPM	5' - 0.50 GPM	5' - 0.50 GPM	5' - 0.50 GPM

Rotary Nozzles:

Rainbird's rotary nozzles are a stream rotor nozzle that fits on a standard Rainbird spray head body. (They also will fit on many other brands of spray-type sprinkler bodies as well.) A standard spray head nozzle creates a fan shaped water pattern, somewhat like a shower nozzle. These rotary nozzles are very different from a standard spray nozzle, they create numerous small streams of water that rotate around the sprinkler head. These water streams are often called fingers or spider legs. They are very attractive to watch operate!

Advantages of Rotary Nozzles.When compared to a standard spray-type nozzle the rotary nozzles have the advantages of a lower precipitation rate, larger radius of throw, and low gallonage requirements. This means you can use more of them on a valve circuit and put them farther apart. It also means you should never combine them on the same valve circuit with standard spray nozzles. They can be spaced between 13 - 24 feet (4,0 - 7,4 meters) apart. They should be installed to provide head-to-head coverage, that is the sprinklers should be spaced no farther than the radius of throw from each other. If you use the R13-18 Series nozzles the sprinklers should be no farther than 18 feet apart. If you use the R17-24 Series nozzles the sprinklers should be no farther than 24 feet apart. Do not try to stretch the spacing between them beyond the limits above!

Disadvantages of Rotary Nozzles.The rotary nozzles require more water pressure to operate than the standard spray nozzles, make sure you have sufficient pressure, as the spacing is severely reduced at lower pressures! So even though they use less water than a standard spray head you may not be able to use smaller pipe sizes due to the need for more water pressure (small pipes reduce the water pressure.) They also do not perform well in windy locations, although they do seem to perform equally to standard spray sprinklers in wind. For really windy areas use a standard rotor with an oversize nozzle, or even better, use drip irrigation.

Performance charts. For performance specifications see the performance charts at Rainbird's website. Rainbird sometimes changes the web locations of their data, if the link is bad do a search for " Rainbird.com rotary nozzle ".

Limitations and over-sell of benefits. Rotary nozzles are being touted by some people as a cure-all for existing sprinkler systems with coverage problems. It is true that they are a great solution for retrofitting older systems where the sprinkler are spaced too far apart. However be careful as many of these older systems do not have enough water pressure to operate rotary nozzles. There is some evidence that the rotary nozzles have a higher efficiency than standard spray heads, and I have herd some people recommend that you should switch your sprinkler system to them even if you are not having problems with water coverage. I have not seen any evidence that the water savings from switching is worth the cost of changing the nozzles to rotary nozzles. The water savings from switching to them, when your irrigation system is already working well, appears to be very minimal, if any. If you want to see if they will improve your existing sprinkler system I suggest you start by testing them on one valve circuit only. Buy the nozzles for your test from a store that will allow you to return them if they don't work out.

Rotary nozzles are not compatible with any of the other spray nozzles and should not be installed on the same valve circuit with the others.

Stream Spray Nozzles:

These Stream Spray nozzles have been discontinued. I'm leaving the data here for those who are retrofitting older systems that still have them.

Stream spray nozzles spray small streams of water that do not rotate. They are used for locations where a very low amount of water needs to be applied to the soil, such as on steep slopes where erosion might be a problem. Do not use stream spray nozzles to water lawn areas. They do not provide even enough coverage for lawn. They work well for established shrubs and ground covers. The small holes that emit the water streams are easily plugged, it is important that you filter the water with a 100 mesh filter if you use stream sprays.

The stream spray nozzles are not compatible with any other series of nozzles.

16 Series MPR Stream Spray Nozzle (Discontinued)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	16F-SLA	13' - 2.37 GPM	14' - 2.66 GPM	15' - 2.96 GPM	16' - 3.22 GPM
	16H-SLA	13' - 1.18 GPM	14' - 1.33 GPM	15' - 1.48 GPM	16' - 1.61 GPM
	16Q-SLA	13' - 0.59 GPM	14' - 0.67 GPM	15' - 0.74 GPM	16' - 0.81 GPM

 

22 Series Stream Spray Nozzle (Discontinued)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	22F-SS	17' - 2.37 GPM	18' - 2.66 GPM	19' - 2.96 GPM	20' - 3.22 GPM
	22H-SS	17' - 1.18 GPM	18' - 1.33 GPM	19' - 1.48 GPM	20' - 1.61 GPM
	22Q-SS	17' - 0.59 GPM	18' - 0.67 GPM	19' - 0.74 GPM	20' - 0.81 GPM

Brass Nozzles:

These brass nozzles have been discontinued. I'm leaving the data here for those who are retrofitting older systems that still have them. If you need replacement brass nozzles, the Buckner/Storm "Coalbrass" nozzles are compatible with these and can be used as replacements.

B8 Series Brass Nozzles (discontinued)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	B8F-FLT	6' - 1.90 GPM	6' - 2.00 GPM	7' - 2.40 GPM	7' - 2.60 GPM
	B8H-FLT	6' - 0.95 GPM	6' - 1.00 GPM	7' - 1.20 GPM	7' - 1.30 GPM
	B8Q-FLT	6' - 0.48 GPM	6' - 0.50 GPM	7' - 0.60 GPM	7' - 0.65 GPM

 

B8 Series Brass Nozzles (discontinued)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	B8F-FLT	7' - 1.90 GPM	8' - 2.00 GPM	9' - 2.40 GPM	10' - 2.60 GPM
	B8H-FLT	7' - 0.95 GPM	8' - 1.00 GPM	9' - 1.20 GPM	10' - 1.30 GPM
	B8Q-FLT	7' - 0.48 GPM	8' - 0.50 GPM	9' - 0.60 GPM	10' - 0.65 GPM

 

B12 Series Brass Nozzles (discontinued)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	B12-F	9' - 1.40 GPM	10' - 1.60 GPM	11' - 1.80 GPM	12' - 2.00 GPM
	B12-H	9' - 0.70 GPM	10' - 0.80 GPM	11' - 0.90 GPM	12' - 1.00 GPM
	B12-T	9' - 0.47 GPM	10' - 0.54 GPM	11' - 0.60 GPM	12' - 0.67 GPM
	B12-Q	9' - 0.35 GPM	10' - 0.40 GPM	11' - 0.45 GPM	12' - 0.50 GPM

 

B15 Series Brass Nozzles (discontinued)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	B15-F	12' - 2.80 GPM	13' - 3.20 GPM	13' - 3.60 GPM	14' - 4.00 GPM
	B15-TQ	12' - 2.10 GPM	13' - 2.40 GPM	13' - 2.70 GPM	14' - 3.00 GPM
	B15-H	12' - 1.40 GPM	13' - 1.60 GPM	13' - 1.80 GPM	14' - 2.00 GPM
	B15-T	12' - 0.94 GPM	13' - 1.07 GPM	13' - 1.20 GPM	14' - 1.33 GPM
	B15-Q	12' - 0.70 GPM	13' - 0.80 GPM	13' - 0.90 GPM	14' - 1.00 GPM

 

B15 Strip Series Brass Nozzles (discontinued)

Pattern	Part No.	15 PSI	20 PSI	25 PSI	30 PSI
	B15-EST	5' x 10' - 0.46 GPM	5' x 12' - 0.53 GPM	6' x 13' - 0.59 GPM	6' x 13' - 0.65 GPM
	B15-CST	5' x 20' - 0.91 GPM	5' x 24' - 1.05 GPM	6' x 26' - 1.29 GPM	6' x 26' - 1.29 GPM
	B15-SST	5' x 20' - 0.91 GPM	5' x 24' - 1.05 GPM	6' x 26' - 1.18 GPM	6' x 26' - 1.29 GPM

PCS Screens:

These optional PCS screens contain a small rubber disk with a hole in it that acts as a pressure regulator. As the water pressure increases the disk is compressed, and the hole in it becomes smaller, and restricts the flow. They are very handy for reducing the radius of a spray-type sprinkler. They work much better than the radius reduction screws on the nozzles and they won't choke off the flow on warm days like the radius screws do. The table below can be used to determine which disc to use with each nozzle to give the exact radius you need. Use of pressure control discs eliminates the need to adjust the heads after installation to prevent misting. When using pressure control discs the radius reduction screw should be left in the full open position.

PCS Screen Performance Table. Read down the left column to find the nozzle you are using. Then read across to find the desired radius in feet. Read up or down the column to find the PCS screen to use for that radius.