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Operation of your S15 Sprayer

The S15 SPRAY-PRO sprayer is designed to be simple to use, easy to operate, and provide years of accurate spraying. The S15 is the latest 

development from Earthway Products, Inc., a world leader in the manufacture of broadcast spreaders, seeding tools, and sprayers. 

Calibration

The S15 is supplied with three different nozzle options. The table below shows the characteristics and performance of the supplied nozzle 

options at the eight different height setting of the DCV holder.

 

Initial Start-up Procedures

Before the first use, partially fill the tank with clean water to test the spray. If it fails to spray, the pump may require priming or the DCV 

rubber valve could be immobile. To fix the DCV, loosen the cap on the DCV to unseat the rubber valve inside and then retighten. To prime 

the pump, select 

TRANSPORT

 and then push for a short distance.  Now, select 

SPRAY

 and test.  Repeat if necessary until a spray is 

achieved.  If unit leaks from the nozzle, remove the cap on the DCV, wipe off the top of DCV body to remove any debris, and then replace 

the cap and tighten.

Before use

Before using any liquid products always read thoroughly the manufacturers product label, to ensure correct dosage and proper handling of 

the product being applied through the applicator.  

Use the correct Safety Equipment as directed by the chemical manufacturer.

 

;

Check that the applicator has been thoroughly cleaned from its previous use and that both the nozzle outlet and the handgun line (if 

included) have been washed thoroughly.

 

;

Always spray on a day where wind is minimal. It can be unsafe and inaccurate if spraying is undertaken in windy conditions.

 

;

Always wear appropriate safety clothing when the sprayer is being used.

 Refer to manufacturers instructions, or contact your supplier 

of the product being applied for safety recommendations.

 

;

Make sure the tires are properly inflated to 20 psi.

How to use ~ 

Walk behind spraying

Practice before use

It is recommended for first time users of the S15, that the user familiarizes themselves with the workings of the sprayer. By simply putting 

water in the spray tank and spraying it out onto a dry tarmac surface the operator will very quickly familiarize themselves with the workings 

of the machine. Make sure the spray tank is then emptied of water before further use.  Make sure the handlebar is locked into place and the 

wing nuts are securely tightened. 

 

;

Choose the correct nozzle of the three nozzle options that is suitable for the product being applied. (See calibration chart above) 

 

;

Ensure the 

SPRAY (ON) / TRANSPORT (OFF)

 lever on the dashboard is in the 

TRANSPORT 

position. The 

TRANSPORT

 

position is with the lever over to the right side when standing behind the handlebars of the machine. 

 

;

Make sure the tank is clean and there is no chance of remnants or deposits from a previous spray task being left in the tank. 

 

;

With the tank clean, fill the tank with the required volume of liquid for the designated spray task, making sure the product being used is 

mixed and being applied in accordance with the manufacturers instructions.

 

;

With the control lever is in the 

TRANSPORT (OFF) 

the machine can be safely pushed to the area where spraying is to be carried out.

 

;

Locate the sprayer at the point at which spraying needs to commence. Lift the machine up off the stand, so the body of  the machine is 

parallel with the ground (see example drawing in the center of the next page). To spray simply turn the control lever 

(ON/OFF)

 over to 

the left side 

(SPRAY POSITION)

, and walk forward at a brisk walking speed 2 to 3 MPH is recommended.

 

;

To stop the spray turn the 

ON/OFF LEVER 

back to the right side 

(TRANSPORT POSITION)

NOTE: 

When the 

SPRAY/

TRANSPORT

 lever is at the right side 

(TRANSPORT POSITION)

 and the machine is being pushed, the pump is circulating the 

liquid through the system. This circulation provides agitation and helps keep the liquids in suspension while walking the sprayer to and 

from the area being treated.

PAGE 3

DASHBOARD

SPRAY                      TRANSPORT

S15

S15

FINE SPRAY

MEDIUM SPRAY

COARSE SPRAY

#3 Gray Nozzle 

Output 2.9L/min

#5 Blue Nozzle 

Output 4.4L/min

#10 Black Nozzle 
Output 5.0L/min

SPRAY RATE

SPRAY RATE

SPRAY RATE

60

1

0.07

74.24

0.11

113.6

0.13

127.3

152cm

1

0.024

0.036

0.040

58

1.5

0.08

76.80

0.12

117.6

0.13

131.7

147cm

1.5

0.024

0.037

0.042

54

2

0.08

82.49

0.13

126.3

0.14

141.4

137cm

2

0.026

0.040

0.045

50

2.5

0.09

89.09

0.14

136.4

0.15

152.7

127cm

2.5

0.028

0.043

0.049

44

3

0.10

101.24

0.15

155.0

0.17

173.6

112cm

3

0.032

0.049

0.055

43

3.5

0.10

103.59

0.16

158.6

0.18

177.6

109cm

3.5

0.033

0.050

0.057

39

4

0.11

114.22

0.17

174.8

0.20

195.8

99cm

4

0.036

0.056

0.062

36

4.5

0.12

123.74

0.19

189.4

0.21

212.1

91cm

4.5

0.039

0.060

0.067

One Gallon = 128oz

#10 Black Nozzle 

Output 168oz/min

SPRAY RATE

SPRAY RATE

FINE SPRAY

#3 Gray Nozzle 

Output 98oz/min

MEDIUM SPRAY

#5 Blue Nozzle 

Output 150oz/min

COARSE SPRAY

Application Coverage - OUNCES/SQUARE FOOT 

|

 OUNCES/1,000 SQUARE FEET

Application Coverage - LITER/SQUARE METER

Spray width 

in Inches

DCV 

Setting 

Position

Spray width in 

Centimeters

DCV 

Setting 

Position

SPRAY RATE

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