| GPM | 1000 PSI | 1200 PSI | 1250 PSI | 1300 PSI | 1500 PSI | 1800 PSI | 2000 PSI | 2100 PSI | 2200 PSI |
|---|---|---|---|---|---|---|---|---|---|
| 2 | 4 | 3.5 | 3.5 | 3.5 | 3.5 | 3 | 3 | 3 | 3 |
| 2.5 | 5 | 4.5 | 4.5 | 4.5 | 4 | 3.5 | 3.5 | 3.5 | 3.5 |
| 3 | 6 | 5.5 | 5.5 | 5.5 | 5 | 4.5 | 4.5 | 4 | 4 |
| 3.5 | 7 | 6.5 | 6.5 | 6 | 5.5 | 5 | 5 | 5 | 4.5 |
| 4 | 8 | 7.5 | 7 | 7 | 6.5 | 6 | 5.5 | 5.5 | 5.5 |
| GPM | 2300 PSI | 2400 PSI | 2500 PSI | 3000 PSI | 3200 PSI | 3500 PSI | 4000 PSI | 5000 PSI |
|---|---|---|---|---|---|---|---|---|
| 2 | 2.5 | 2.5 | 2.5 | 2.5 | 2 | 2 | 2 | 2 |
| 2.5 | 3.5 | 3 | 3 | 3 | 3 | 2.5 | 2.5 | 2 |
| 3 | 4 | 4 | 4 | 3.5 | 3.5 | 3 | 3 | 2.5 |
| 3.5 | 4.5 | 4.5 | 4.5 | 4 | 4 | 3.5 | 3.5 | 3 |
| 4 | 5.5 | 5 | 5 | 4.5 | 4.5 | 4.5 | 4 | 3.5 |
Match your pressure washer's PSI and GPM in blue. The correct orifice size will be listed in the grey area.