How to Read a Pressure Washer Nozzle Chart
If you own a pressure washer in Ireland or the UK, choosing the correct pressure washer nozzle size is critical for performance, safety, and cleaning power.
At NII CLEAN Products, we supply Honda pressure washers, petrol pressure washers, diesel pressure washers, industrial pressure washers, commercial pressure washers, and professional pressure washing accessories throughout Northern Ireland, Ireland, England, Scotland, Wales, and Europe.
This guide will teach you exactly how to read a pressure washer nozzle chart and choose the correct nozzle for your machine.
What Is a Pressure Washer Nozzle Chart?
A pressure washer nozzle chart matches your:
- Pressure (BAR / PSI)
- Water Flow (LPM / GPM)
To the correct nozzle orifice size.
Using the correct nozzle:
- Protects your pump
- Prevents pressure loss
- Maximises cleaning power
- Prevents cavitation
- Extends engine life
This applies to:
- Honda pressure washers
- Petrol pressure washers
- Diesel pressure washers
- Industrial pressure washers
- Commercial pressure washers
- Hot water pressure washers
- Cold water pressure washers
The Only Two Things You Need to Know
To read the chart, you only need:
1. BAR pressure
2. Litres per minute (LPM)
You’ll find these on the rating plate of your:
- Honda GX pressure washer
- Petrol power washer
- Diesel power washer
- Industrial jet washer
How the Chart Is Laid Out
- Top row: BAR pressure
- Side column: LPM flow rate
- Middle numbers: Flow values
- Horizontal row: Nozzle size
Example 1
200 BAR Petrol Pressure Washer – 14 LPM
1. Go to 200 bar across the top
2. Move down to 14 LPM
3. You’ll see 13.3, 14.1, 16
4. Closest = 14.1
5. Read across → Nozzle size = 0.45
✔ Correct for Honda petrol pressure washer
Example 2
100 BAR Diesel Pressure Washer – 12 LPM
1. Go to 100 bar
2. Down to 12 LPM
3. You’ll see 11.3, 12.4, 13.6
4. Closest = 12.4
5. Read across → Nozzle size = 0.55
✔ Correct for diesel pressure washer
Why Correct Nozzle Size Is Essential
| Issue | Cause |
|---|---|
| Low pressure | Nozzle too big |
| Pump strain | Nozzle too small |
| Pulsing | Flow mismatch |
| Overheating | Incorrect jet size |
| Cavitation | Wrong orifice |
This applies to:
- Honda pressure washers
- Petrol jet washers
- Diesel jet washers
- Trailer mounted pressure washers
- Van mounted pressure washers
Buy Pressure Washer Nozzles in Ireland & UK
At NII CLEAN Products, we stock:
- Pressure washer nozzles
- Turbo nozzles
- Rotary turbo lances
- Surface cleaners
- Drain jetting nozzles
- Honda parts
- Hoses, fittings, couplers
We supply across:
Northern Ireland, Republic of Ireland, England, Scotland, Wales & Europe.
Contact NI CLEAN Products
📍 NI CLEAN Products
96 Bushmills Road
Coleraine, Co. Derry, Northern Ireland
📞 Mobile: 07907 021981
☎ Landline: 02870 348834