Honda WB20 Petrol Water Pump | 2 Inch, 620 L/min Site & Flood Pump
Built for the job
Honda WB20 Petrol Water Pump | 2 Inch, 620 L/min Site and Flood Pump
The Honda WB20 is the industry-standard 2 inch petrol water pump, designed for users who need high-volume water transfer and absolute reliability. Powered by the commercial-grade Honda GX120 4-stroke engine, this centrifugal pump is engineered to handle demanding tasks on construction sites, farms and during emergency flood relief.
Self-priming, centrifugal pumps manufactured by Honda and fitted with 4-stroke, recoil start enginess.
It strikes the balance between high-flow performance and portable ease of use, weighing only 21kg, and moves up to 620 litres of water every minute so even large dewatering jobs are completed quickly.
Key features and benefits
- Legendary Honda GX120 engine: the 4-stroke OHV engine is renowned for easy starting, fuel efficiency and long-term durability in harsh conditions
- Cast iron volute and impeller: heavy-duty internals give superior resistance to abrasive silt and sand, unlike cheaper alternatives
- Silicon carbide mechanical seals: high-grade seals ensure leak-free operation and extend pump life
- Oil Alert system: automatically shuts down the engine if the oil level falls below a safe limit, protecting your investment
- Anti-vibration mounts: pump and engine sit on rubber dampers within a protective steel frame to reduce stress and noise
- Small solids handling: a robust suction strainer passes small suspended solids while protecting the pump from larger debris
Ideal applications
The WB20 is a versatile workhorse across professional sectors. In construction it is the primary choice for draining trenches, footings and manholes. In agriculture it is ideal for filling water bowsers and managing irrigation. It is also essential for emergency services and utility companies handling rapid flood clearance and mains burst management. Its compact dimensions make it easy to transport in a small van or utility vehicle.
- Site drainage and dewatering
- Construction and civil engineering projects
- Utility and infrastructure maintenance
- Irrigation and agricultural water transfer
- Wash down applications
- Hire fleet and contractor use
Performance
- Maximum discharge: 620 L/min
- Maximum total head: 32m
- Maximum suction head: 7.5m
- Ports: 2 inch (50mm) suction and discharge
- Engine: Honda GX120, 122cc, 2.4kW
- Dry weight: 21kg
- Inlet/Outlet: 50mm
- Engine Power: 4 HP
- Maximum Solid Size: 6mm
- Fuel Tank / Runtime: 2 litres / approx. 1 hour 42 minutes
The WB20 will pump up to 79,000 litres on a single tank-full of fuel. The pump is housed within a frame to provide a stable surface to operate from and to make transportation easier.
Which Honda pump do you need?
The WB20 is the general-purpose 2 inch standard, and the one to choose when you need more lift. For lightweight transfer around the home, see the 1 inch Honda WX10. For maximum volume on large dewatering and flood jobs, see the 3 inch Honda WB30. See the full comparison below.
Why choose the Honda WX & WB petrol pumps?
Honda WX and WB pumps are trusted for their build quality, ease of use and dependable performance. With a range of sizes and flow rates available, they offer a reliable solution for both light‑duty and higher‑capacity pumping tasks, making them ideal for contractors, utilities and hire companies that need proven petrol‑powered water pumps.
Operational Details
- Powered by Honda 4‑stroke petrol engines
- Self‑priming centrifugal pump design
- Lightweight and highly portable
- Ceramic mechanical seals for increased reliability
- Suitable for clean and lightly silty water
- Available in three models to suit different flow and discharge requirements
Honda WX10 vs WB20 vs WB30
All three are Honda 4-stroke petrol water pumps. The right one depends on how much water you need to move and how far you need to lift it.
- Honda WX10: 1 inch, up to 120 L/min, 37m head, 6.1kg. Lightweight transfer around the home, garden and boat.
- Honda WB20: 2 inch, up to 620 L/min, 32m head, 21kg. The general-purpose site, farm and flood standard, and the choice when you need more lift.
- Honda WB30: 3 inch, up to 1,100 L/min, 23m head, 26kg. The high-volume choice for large dewatering and flood, when you need maximum flow.
What’s in the box
1 × Honda WX or WB petrol water pump
1 × Set of hose couplings
Washers, clips and strainer
Please note: hoses are not included and must be purchased separately.
Full spec sheet
| Model | WX10 | WB20 | WB30 |
| Inlet | 25mm (1") | 50mm (2") | 80mm (3") |
| Outlet | 25mm (1") | 50mm (2") | 80mm (3") |
| Engine | GX25 | GX120 | GX160 |
| Fuel | Petrol | Petrol | Petrol |
| Oil Alert | No | Yes | Yes |
| HP | 1.5 | 4 | 5.5 |
| Flow ltr/min | 140 | 620 | 1100 |
| Head /m | 36 | 32 | 28 |
| Free Passage | 5 | 6 | 6 |
| W x L x H /mm | 220 x 325 x 300 | 365 x 455 x 420 | 385 x 510 x 455 |
| Weight /Kg | 6 | 21 | 26 |
