How to Choose a Pressure Washer: Bar, Flow Rate and Power Explained
Dust storms, muddy winter streets and long summers leave cars, yards and walls in Iraq covered in dirt. A pressure washer blasts it away in minutes and uses less effort than a bucket and brush. But what do bar, L/h and watts mean, and how much power do you really need? This guide explains the numbers so you can choose the right pressure washer for your jobs.
1. Pressure (bar): how hard the water hits
Bar measures the force of the water jet. Higher pressure removes stuck-on dirt, mud and stains faster.
- Around 90 bar: cars, bikes, garden furniture and light patio cleaning.
- Around 150 bar: heavy dirt on yards, walls, driveways and outdoor areas, plus faster car washing.
2. Flow rate (L/h): how fast you clean
Flow rate is how much water the machine pushes out every hour. More water rinses dirt away faster, so you finish large areas sooner.
3. Motor power (watts)
A stronger motor produces higher pressure and flow. A full copper motor is built for reliable, long-lasting work.
4. Comfort and handy features
- Hose and cable length: longer hoses and cables let you move around the car or yard without moving the machine.
- Wheels and handle: make a heavier machine easy to move.
- Detergent bottle: adds soap to the water for greasy or very dirty surfaces.
- Auto shut-off: protects the motor if it overloads or runs short of water.
Quick comparison
| Compact (90 bar) | Powerful (150 bar) | |
|---|---|---|
| Motor | 1300W | 2000W |
| Flow rate | 280L/h | 360L/h |
| High-pressure hose | 3m | 5m |
| Moving it | Carry handle | Wheels and carry handle |
| Best for | Cars, bikes, garden furniture | Yards, walls, driveways and frequent car washing |
Which MODEX pressure washer fits you?
- MODEX PW7700: compact 1300W full copper motor, 90 bar and 280L/h, with a 3m high-pressure hose, 5m cable and detergent bottle — ideal for cars, patios and garden furniture.
- PW7800: 2000W full copper motor, 150 bar and 360L/h, metal spray gun and lance, 5m hose and 5m cable, integrated detergent bottle, wheels, and it works upright or lying down.
- PW7900: 2000W full copper motor, 150 bar and 360L/h, metal spray gun with lock handle and metal lance, 5m hose with storage, wheels and on-board accessory storage.
All three have 2-rate water flow adjustment, a garden hose quick connector and auto shut-off on overload or water shortage.
Browse the full pressure washers collection.
Frequently asked questions
How many bar do I need to wash a car?
90 bar is enough for regular car washing. 150 bar cleans faster and also handles heavy mud on wheels and floor mats.
Can I use a pressure washer on walls and yards?
Yes. For large outdoor areas, choose a 150 bar model such as the PW7800 or PW7900 for faster cleaning.
Does it need a special water supply?
No. It connects to a normal garden hose with the quick connector.
What happens if the water runs out?
The machine switches off automatically to protect the motor.
Every MODEX pressure washer comes with a 3-year warranty. Order online and pay on delivery. We deliver to all Iraqi provinces for a delivery fee of 5,000 IQD.
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