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How to Choose Pressure Washers
PSI, flow rate, hot vs cold — everything you need to choose the right pressure washer.
Ask an ExpertA pressure washer that's too weak won't clean. One that's too powerful will damage surfaces. The right choice depends on what you're cleaning, how often, and the surface type. This guide cuts through the confusion.
Who Needs Pressure Washers?
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Factories & Plants
Machinery, floors, loading docks
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Vehicle Cleaning
Trucks, buses, heavy equipment
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Building Exteriors
Facades, parking lots, driveways
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Food Processing
Hot water for grease and hygiene
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Construction
Post-construction cleanup, concrete
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Oil & Gas Facilities
High-pressure degreasing
Key Specifications Explained
Pressure (bar / PSI)
The force of water output
GUIDANCE: Light cleaning (vehicles, floors): 80–120 bar. Medium (driveways, equipment): 120–180 bar. Heavy (industrial degreasing): 180–250 bar+.
Flow Rate (litres/hour)
Volume of water pumped per hour
GUIDANCE: Higher flow = more water consumption but faster cleaning. 400–600 L/hr for light use. 600–1200 L/hr for industrial.
Hot vs. Cold Water
Whether it heats the water before spraying
GUIDANCE: Cold water: for dirt and mud. Hot water (60–90°C): essential for grease, oil, and food residue. Hot machines cost 2–3x more but are far more effective on grease.
Electric vs. Petrol
Power source
GUIDANCE: Electric for indoor use (no fumes). Petrol for outdoor, remote areas without power. Petrol machines are more powerful but louder and require fuel.
Lance / Nozzle Set
Different nozzle angles for different surfaces
GUIDANCE: 0° (pencil jet) for drains. 15° for tough stains. 25–40° for general surfaces. Always use wider angle on delicate surfaces.
Hose Length
Reach of the machine
GUIDANCE: 8–10m standard. For large vehicles or buildings, get 15–20m or an extension set.
Size & Budget Guide
Light
Light duty (vehicles, patios)
Cold water, 100–130 bar, 400–600 L/hr, electric. Budget: ₹20,000–50,000.
Medium
Medium duty (parking lots, equipment)
Cold water, 140–180 bar, 600–900 L/hr, electric. Budget: ₹50,000–1,20,000.
Heavy
Heavy industrial (degreasing, factories)
Hot water, 180–250 bar, 900–1500 L/hr. Budget: ₹1,20,000–4,00,000.
Specialist
Food processing / kitchen
Hot water mandatory, 150–200 bar, detergent injection. Budget: ₹1,50,000–3,50,000.
Common Buying Mistakes to Avoid
✕Using cold water for grease — cold water pushes grease around. Hot water (70°C+) actually emulsifies it.
✕Buying by pressure alone — a high-bar machine with low flow rate cleans slowly. Both specs matter.
✕Wrong nozzle on wrong surface — a 0° jet can cut through wood or strip paint. Always start with a wider angle.
✕Underestimating water supply requirements — large machines need 500–1500 L/hr flow. Check your water supply first.
✕No detergent injection — for heavily soiled surfaces, a machine with built-in detergent injection is 3x more effective.
Frequently Asked Questions
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