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Full Description
KIAM KM3700PHI 21 LPM Hi-Flow Petrol Pressure Washer
Flow is what moves dirt. The KM3700PHI pushes 21 litres of water every minute through a hi-flow pump driven by a 14HP 420cc KIAM 4-stroke engine. You rinse faster, clear more ground per hour and finish big driveways, yards and machinery in less time.
It's ready to feed from a tank or water butt straight out of the box. A 3m suction hose with inline filter is included, and it's rated to 3700 PSI / 255 bar maximum.
The KM3700PHI in action
Pressure breaks it loose. Flow carries it away.
Plenty of machines quote big PSI figures. Without volume behind them, though, you end up chasing the same slurry around the patio. At 21 LPM the KM3700PHI puts serious water on the surface, so loosened moss, mud and grime get flushed off in one pass, not three.
- Faster rinse-off: clears mud, moss and slurry quicker than standard-flow machines
- More ground per hour: ideal for large driveways, patios and yards
- Better chemical draw with downstream injection set-ups
- Ideal partner for rotary surface cleaners: more water means a cleaner pre-rinse and post-rinse
Working pressure 3000 PSI / 200 bar, maximum 3700 PSI / 255 bar. That's plenty of cutting power, with the extra flow doing the heavy lifting.
Water delivered per hour at rated flow
Based on rated flow: 21 LPM versus 15 LPM.
Built for big surfaces and heavy rinsing
Driveways & yards
Cut job times with high-volume rinsing across large areas.
Plant & machinery
Shift baked-on debris fast after a chemical dwell.
Surface cleaner work
The ideal flow for pre-rinse and post-rinse with rotary surface cleaners.
What you get with the KM3700PHI
- 21 LPM hi-flow pump tuned for volume and longevity
- 14HP 420cc KIAM OHV 4-stroke air-cooled petrol engine
- Low-oil shutdown protects the engine automatically
- Heavy steel chassis with anti-vibration shock absorbers
- Tank-feed ready with 3m suction hose and inline filter
- 5 quick-release nozzles for instant spray changes
- 10m high-pressure hose, professional trigger gun and steel lance
- Tool kit and user manual supplied
Feeding 21 litres every minute
A 21 LPM pump needs a supply that can keep up. Many domestic taps can't, so most operators run the KM3700PHI from a buffer tank, IBC or water butt using the supplied suction hose and filter.
Quick tap test: time how long your tap takes to fill a 10 litre bucket. For a 21 LPM supply, you need it full in about 29 seconds or less. Any slower and you should feed from a tank.
Feeding from a tank? Read our guide: Can I run my pressure washer from a water butt or tank?
Ready to work out of the box
- KM3700PHI petrol pressure washer
- 10m high-pressure hose
- Professional trigger gun & steel lance
- 5 × steel quick-release spray nozzles
- 3m water suction hose with inline filter
- Tool kit & user manual
Pressure gauge sold separately.
KM3700PHI specification
| Specification | KIAM KM3700PHI |
|---|---|
| Rated Flow | 21 LPM (1,260 litres per hour) |
| Maximum Pressure | 3700 PSI / 255 bar |
| Working Pressure | 3000 PSI / 200 bar |
| Pump | KIAM (18mm) Hi-flow pump |
| Engine | LONCIN 14HP OHV 4-stroke, air-cooled |
| Displacement | 420cc |
| Engine Speed | 3400 rpm |
| Max Torque | 26.5 N·m |
| Starting System | Recoil pull start |
| Fuel | Unleaded petrol |
| Engine Protection | Low-oil shutdown |
| Chassis | Heavy steel frame with anti-vibration mounts |
| Dimensions (L × W × H) | 79 × 50 × 60 cm |
| Weight | 70kg |
Manuals and further information: Instruction Manuals
Backed by the equip2clean team
Warranty: 12 months warranty
UK after-sales support: call 0151 548 5500 or email contact@equip2clean.co.uk. Servicing and repairs are handled at our repair centre in Knowsley.
Before you buy
Can I run the KM3700PHI from a garden tap?
Only if your tap can consistently supply 21 litres per minute. A 10 litre bucket should fill in about 29 seconds or less. Most domestic supplies fall short, so feeding from a buffer tank, IBC or water butt with the supplied suction hose is the most reliable set-up.
Why choose 21 LPM over a higher-pressure, lower-flow machine?
Pressure loosens dirt; flow carries it away. On large flat surfaces, and when rinsing after a surface cleaner or chemical treatment, extra volume gets the job finished faster. At 21 LPM you're putting down 40% more water than a 15 LPM machine.
How long will a 1,000 litre IBC last?
At the full rated flow of 21 LPM, around 47 minutes of continuous spraying. In real work you'll get longer, because the trigger isn't held down constantly.
Which nozzles are included?
Five steel quick-release nozzles: 0° pinpoint, 15° narrow fan, 25° general cleaning, 40° wide fan, and a soap nozzle for low-pressure chemical application.
Is the engine protected?
Yes. The KIAM engine has a low-oil shutdown that stops it automatically if oil drops too low, helping to prevent costly engine damage.
From the equip2clean blog
21 litres a minute. More ground, less time.
If you're cleaning big surfaces for a living, the KM3700PHI's hi-flow output will pay for itself in time saved. Not sure it's the right machine for your work? Talk to the equip2clean team.
Contact the equip2clean team21LPM Petrol Pressure Washer – Kiam KM3700PHI HIFLOW | 14HP Jet Cleaner
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