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Proper nozzle size selection is necessary for your pressure washer to operate at optimum performance. Determine the nozzle size by the pressure washer's GPM @ PSI (gallons per minute at a specific pounds per square inch). If the nozzle size is too small, your pressure washer can be damaged. If the nozzle size is too large, cleaning ability is compromised. Nozzle fan degree (color of the nozzle housing) does not effect nozzle size selection. To use our Nozzle Size Selection Chart: Select the PSI of your pressure washer in the top row, then drop down to your operating GPM. Follow that to the left hand column for correct nozzle size.
Nozzle Size Hole Size Pounds Per Square Inch (PSI)
500 750 1000 1250 1500 1750 2000 2250 2500 2750 3000 3250 3500 3750 4000 4500 5000
2 .034”
0.86mm 		0.71 0.87 1.00 1.12 1.22 1.32 1.41 1.50 1.58 1.66 1.73 1.80 1.87 1.94 2.00 2.12 2.24
2.5 .042”
1.07mm 		0.88 1.08 1.25 1.40 1.53 1.65 1.77 1.88 1.98 2.07 2.17 2.25 2.34 2.42 2.50 2.65 2.80
3 .043”
1.09mm 		1.06 1.30 1.50 1.68 1.84 1.98 2.12 2.25 2.37 2.49 2.60 2.70 2.81 2.90 3.00 3.18 3.35
3.5 .048”
1.22mm 		1.24 1.52 1.75 1.96 2.14 2.32 2.47 2.63 2.77 2.90 3.04 3.15 3.27 3.39 3.50 3.71 3.91
4 .052”
1.32mm 		1.41 1.73 2.00 2.24 2.45 2.65 2.83 3.00 3.16 3.32 3.46 3.61 3.74 3.87 4.00 4.24 4.47
4.5 .055”
1.40mm 		1.59 1.95 2.25 2.52 2.76 2.98 3.18 3.38 3.56 3.73 3.90 4.06 4.21 4.36 4.50 4.77 5.03
5 .057”
1.45mm 		1.77 2.17 2.50 2.80 3.06 3.31 3.54 3.75 3.95 4.15 4.33 4.51 4.68 4.84 5.00 5.30 5.59
5.5 .060”
1.52mm 		1.94 2.38 2.75 3.07 3.37 3.64 3.89 4.13 4.35 4.56 4.76 4.96 5.14 5.33 5.50 5.83 6.15
6 .062”
1.57mm 		2.12 2.60 3.00 3.35 3.67 3.97 4.24 4.50 4.74 4.97 5.20 5.41 5.61 5.81 6.00 6.36 6.71
6.5 .064”
1.63mm 		2.30 2.81 3.25 3.63 3.98 4.30 4.60 4.88 5.14 5.39 5.63 5.86 6.08 6.29 6.50 6.89 7.27
7 .067”
1.70mm 		2.47 3.03 3.50 3.91 4.29 4.63 4.95 5.25 5.53 5.80 6.06 6.31 6.55 6.78 7.00 7.42 7.83
7.5 .070”
1.7mm 		2.65 3.25 3.75 4.19 4.59 4.96 5.30 5.63 5.93 6.22 6.50 6.76 7.02 7.26 7.50 7.95 8.39
8 .072”
1.83mm 		2.83 3.46 4.00 4.47 4.90 5.29 5.66 6.00 6.32 6.63 6.93 7.21 7.48 7.75 8.00 8.49 8.94
8.5 .074”
1.88mm 		3.01 3.68 4.25 4.75 5.21 5.62 6.01 6.38 6.72 7.05 7.36 7.66 7.95 8.23 8.50 9.02 9.50
9 .076”
1.93mm 		3.18 3.90 4.50 5.03 5.51 5.95 6.36 6.75 7.12 7.46 7.79 8.11 8.42 8.71 9.00 9.55 10.06
9.5 .078”
1.98mm 		3.36 4.11 4.75 5.31 5.82 6.28 6.72 7.13 7.51 7.88 8.23 8.56 8.89 9.20 9.50 10.08 10.62
10 .080”
2.03mm 		3.54 4.33 5.00 5.59 6.12 6.61 7.07 7.50 7.91 8.29 8.66 9.01 9.35 9.68 10.00 10.61 11.18
11 .083”
2.11mm 		3.89 4.76 5.50 6.15 6.74 7.28 7.78 8.25 8.70 9.12 9.53 9.92 10.29 10.65 11.00 11.67 12.30
12 .087”
2.21mm 		4.24 5.20 6.00 6.71 7.35 7.94 8.49 9.00 9.49 9.95 10.39 10.82 11.22 11.62 12.00 12.73 13.42
12.5 .089”
2.26mm 		4.42 5.41 6.25 6.99 7.65 8.27 8.84 9.38 9.88 10.36 10.83 11.27 11.69 12.10 12.50 13.26 13.98
13 .091”
2.31mm 		4.60 5.63 6.50 7.27 7.96 8.60 9.19 9.75 10.28 10.78 11.26 11.72 12.16 12.59 13.00 13.79 14.53
15 .096”
2.44mm 		5.30 6.50 7.50 8.39 9.19 9.92 10.61 11.25 11.86 12.44 12.99 13.52 14.03 14.52 15.00 15.91 16.77
20 .109”
2.77mm 		7.07 8.66 10.00 11.18 12.25 13.23 14.14 15.00 15.81 16.58 17.32 18.03 18.71 19.36 20.00 21.21 22.36
25 .125”
3.18mm 		8.84 10.83 12.50 13.98 15.31 16.54 17.68 18.75 19.76 20.73 21.65 22.53 23.39 24.21 25.00 26.52 27.95
30 .141”
3.58mm 		10.61 12.99 15.00 16.77 18.37 19.84 21.21 22.50 23.72 24.87 25.98 27.04 28.06 29.05 30.00 31.82 33.54
40 .156”
3.96mm 		14.14 17.32 20.00 22.36 24.49 26.46 28.28 30.00 31.62 33.17 34.64 36.06 37.42 38.73 40.00 42.43 44.72
50 .172”
4.37mm 		17.68 21.65 25.00 27.95 30.62 33.07 35.36 37.50 39.53 41.46 43.30 45.07 46.77 48.41 50.00 53.03 55.90
60 .188”
4.78mm 		21.21 25.98 30.00 33.54 36.74 39.69 42.43 45.00 47.43 49.75 51.96 54.08 56.12 58.09 60.00 63.64 67.08