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J.Racenstein Tips

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The orifice size of the nozzle determines the operating pressure of your machine. A

The smaller the orifice, the greater the restriction of water flowing through the machine. This causes the pressure to increase.

Use a Larger orifice nozzle and you will will reduce operating pressure.

Choosing a nozzle with too small of an orifice will limit water flow and possibly create an excessive use of the unloader on the Pressure Washer.

Use the table below to select the properly sized nozzle for your machine. Determine the nozzle size by matching the operating pressure (PSI) of your machine to the gallons per minute (GPM).

Spray
Angle Degree
Distance from the nozzle orifice Spray
Pattern
Spray
Angle
% Impact/Sq.In. of Theoretical Impact*
 ..
2in
4in
6in
8in
10in
12in
15in
18in
24in
30in
36in
FAN
15
30%
15
0.5in
1.1in
1.6in
2.1in
2.6in
3.2in
3.9in
4.7in
6.3in
7.9in
9.5in
FAN
25
18%
25
0.9in
1.8in
2.7in
3.5in
4.4in
5.3in
6.6in
8in
10.6in
13.3in
15.9in
FAN
40
12%
40
1.5in
2.9in
4.4in
5.8in
7.3in
8.7in
10.9in
13.1in
17.5in
21.8in
26.2in
FAN
50
10%
50
1.9in
3.7in
5.6in
7.5in
9.3in
11.2in
14in
16.8in
22.4in
28in
33.6in
FAN
65
7%
65
2.5in
5.1in
7.6in
10.2in
12.7in
15.3in
19.2in
22.9in
30.5in
38.2in
45.8in

Surface Cleaner Nozzle Recommendation (2 to 5 nozzles)

Pump
Capacity
Quantity of Nozzles / Pressure in psi:
Size 2 3 4 5
Nozzles Nozzles Nozzles Nozzles
4 GPM 2 4000 1800 1000 700
2.5 2200 1000 600 -
3 1900 750 - -
4 1000 - - -
5 GPM 2 - 2800 1600 1000
2.5 4000 1600 900 600
3 2700 1300 600 -
4 1500 650 - -
5 1000 - - -
6 GPM 2 - 4400 2250 1600
2.5 - 2200 1300 900
3 4000 1900 1000 650
4 2400 1000 550 -
5 1400 650 - -
6 1000 450 - -
8 GPM 2 - - 4000 2500
2.5 - - 2200 1500
3 - 3200 1900 1100
4 4000 1800 1000 600
5 2500 1100 650 -
6 1800 800 - -
7 1300 - - -
10 GPM 2 - - - 4000
2.5 - - 4000 2200
3 - - 2750 1800
4 - 2800 1500 1000
5 4000 1700 1000 650
6 2700 1300 700 -
7 2000 900 500 -
8 1500 650 - -
9 1200 - - -