
The AES Tornado Heavy Duty range features a 2:1 reduction gearbox that halves the pump speed from engine RPM, so where a direct-drive pump hammers away at 3,400 RPM, these Udor pumps run at a relaxed 1,700 RPM. The result is dramatically less wear on plungers, seals, valves, and bearings — from over 30 years of servicing water blasters we know these low-RPM pumps consistently last many times longer than direct-mounted units, with significantly lower maintenance costs. An added bonus: the low-RPM pumps will self-prime up to 1 metre of suction head (use our optional suction kit), so you can draw water from a drum, tank, trough, or stream — ideal for rural and coastal locations with limited mains supply. Four models available with Honda GX200 to GX390 engines, pressures from 150 to 280 Bar, and flows from 14 to 19 L/min.
| Output | Maximum 150 Bar (2175 PSI), 14 L/min |
| Engine | Honda GX200 OHV with low oil alert system |
| Pump | Udor PND 3.5/20S — low-RPM crankshaft drive, brass head, ceramic plungers |
| Gearbox | 2:1 reduction gearbox |
| HP Hose | 10 metre wire braided with couplers |
| Gun & Lance | Gun with 900mm S/S lance & ceramic nozzle |
| Output | Maximum 200 Bar (3000 PSI), 15 L/min |
| Engine | Honda GX270 OHV with low oil alert system |
| Pump | Udor BD 4.0/30S — low-RPM crankshaft drive, brass head, ceramic plungers |
| Gearbox | 2:1 reduction gearbox |
| HP Hose | 12 metre wire braided with couplers |
| Gun & Lance | Gun with 900mm S/S lance & ceramic nozzle |
| Output | Maximum 200 Bar (3000 PSI), 19 L/min |
| Engine | Honda GX390 OHV with low oil alert system |
| Pump | Udor CD 5.5/30S — low-RPM crankshaft drive, brass head, ceramic plungers |
| Gearbox | 2:1 reduction gearbox |
| HP Hose | 12 metre wire braided with couplers |
| Gun & Lance | Gun with 900mm S/S lance & ceramic nozzle |
| Output | Maximum 280 Bar (4000 PSI), 15 L/min |
| Engine | Honda GX390 OHV with low oil alert system |
| Pump | Udor BKD 4.0/44S — low-RPM crankshaft drive, brass head, ceramic plungers |
| Gearbox | 2:1 reduction gearbox |
| HP Hose | 12 metre twin-wire braided with couplers |
| Gun & Lance | Gun with 900mm S/S lance & wash jet |
View parts catalogues, datasheets, and service manuals:
AES Waterblasters carries a comprehensive range of genuine spare parts, including seals, valves, plungers, bearings, and all common service items. Contact us on 09 271 4782 or visit our Auckland showroom for parts enquiries.

My partner and I own a small water blasting company on Waiheke Island, and these guys have gone above and beyond to help us fix and solve all the issues...
Our AES Trailer mounted Water blasters are used every day, and just keep on going. They are great machines.
Thanks so much for your help. I will call the office to order that part. It is an absolutely amazing machine (AES Electroblast) So reliable and does a fantastic job.
