Reference
Pressure washer nozzle orifice sizes and the PSI and GPM they suit
Pick an orifice size to see the machine PSI and GPM its makers pair it with, how it differs from the spray angle, and the tips and attachments made in that size.
- Nozzle size 2.5
- Nozzle size 3.0
- Nozzle size 3.5
- Nozzle size 4.0
Choose your nozzle size to see the key facts and what fits. Each fact links to its source on the full page.
All nozzle orifice sizes
- Nozzle size 2.5 A size 2.5 pressure washer nozzle: its 0.039 in orifice, 2.17 GPM at 3,000 PSI on General Pump's chart, and its flow at 1,500 and 2,000 PSI by the formula.
- Nozzle size 3.0 A size 3.0 nozzle: Cat Pumps' 0.043 in orifice, MTM's 1.1 mm foam cannon orifice, DEWALT's 3,400 PSI size 3.0 tips and turbo, and its flow by pressure.2 products that fit
- Nozzle size 3.5 A size 3.5 nozzle: MTM's 1.25 mm foam cannon orifice, the bottom of Active's 3.5 to 5.0 range for the Active 2.0, and its flow by pressure.
- Nozzle size 4.0 A size 4.0 nozzle: its 0.052 in orifice, 4.00 GPM at 4,000 PSI, 3.46 at 3,000 and about 2.83 at 2,000 on General Pump's chart, and DEWALT's 4,500 PSI tips.2 products that fit