Choose a water pump first by the type of water: a standard pump handles clean and slightly dirty water, a trash pump is needed for dirty water with silt and small stones, and a high-pressure pump is the choice for sending water high or far. Then check the flow in m³/h, maximum head, suction lift and port diameter. Garden irrigation usually needs 27–36 m³/h and a 40–50 mm port; a flooded, muddy basement calls for a dirty-water pump with an 80 mm port.
Step 1: clean, dirty or high pressure?
This question settles half the choice. Our WEIMA product pages state the maximum size of solids the pump can pass:
- Clean and slightly dirty water pumps (solids up to 3 mm) are for irrigation, drawing water from a pond, river or tank, and emptying a pool. They are not meant for silt and sand.
- Dirty water (trash) pumps pass larger debris. The WEIMA 80-26 handles solids up to 30 mm, so it suits flooded basements and trenches, ponds and flood clean-up.
- High-pressure pumps deliver less flow but much more head. The WEIMA 65-55 lifts water up to 50 m and passes solids up to 5 mm, which helps with drip irrigation, sprinklers and sloping plots.
The most common mistake is a clean-water pump where silt appears: the impeller quickly clogs and wears. If you are unsure what the water will be like, pick a dirty-water model.
Step 2: flow, head, suction lift and ports
- Flow (m³/h) is how much water the pump moves per hour. 1 m³/h is about 16.7 l/min, so 36 m³/h is about 600 l/min. The stated figure is a maximum; with long hoses and a big height difference, real flow is lower.
- Maximum head is the height at which flow drops almost to zero. Add up the height difference and hose losses and buy with a margin. Our range goes from 20 m (40-20) to 50 m (65-55).
- Suction lift is physically limited to a few metres. The spec tables of our 7 HP pumps give 8 m while the descriptions give 7 m, so plan on about 7 m: place the pump as close to the water as possible and use a short, rigid suction hose.
- Port diameter: 40 mm (1.5"), 50 mm (2"), 80 mm (3") or 100 mm (4"). The larger the diameter, the higher the flow and the bigger the solids that get through. Match hoses to the ports; a hose that is too thin limits output.
WEIMA water pumps: comparison table
Data from the product pages, prices as of 24.10.2026. All models in the table are in stock.
| Model | Water type | Flow | Max. head | Ports | Solids up to | Engine | Weight | Price |
|---|---|---|---|---|---|---|---|---|
| WEIMA 40-20 (WMQGZ40-20B) | clean and slightly dirty | 27 m³/h | 20 m | 40 mm (1.5") | 3 mm | petrol 2 HP | 13 kg | 689 zł |
| WEIMA 50-30 (WMQGZ50-30) | clean and slightly dirty | 36 m³/h | 30 m | 50 mm (2") | 3 mm | petrol 7 HP | 25 kg | 1099 zł |
| WEIMA 80-30 (WMQGZ80-30) | clean and slightly dirty | 60 m³/h | 30 m | 80 mm (3") | 3 mm | petrol 7 HP | 28 kg | 1149.99 zł |
| WEIMA 65-55 (WMQBL65-55) | high-pressure, clean and slightly dirty | 35 m³/h | 50 m | 65 / 50 mm | 5 mm | petrol 7 HP | 28 kg | 1498.99 zł |
| WEIMA 80-26 (WMPW80-26) | dirty water (trash pump) | 78 m³/h | 26 m | 80 mm (3") | 30 mm | petrol 7 HP | 36 kg | 2249 zł |
| WEIMA WMCGZ100-30E | clean and dirty | 96 m³/h | 30 m | 100 mm | not stated | diesel 9.5 HP, electric start | 65 kg | 4399 zł |
How to read it: for a garden or allotment the 40-20 or 50-30 is enough, the 80-30 moves large volumes of clean water quickly, the 80-26 is for dirty water, and the diesel WMCGZ100-30E is built for long hours all season. If you own a two-wheel tractor with a PTO, see also our PTO-driven pumps.
Before the first start
- Oil: according to the product pages, the engine must be filled with oil before starting. Crankcase capacity is 0.6 l on the 7 HP petrol models and 1.65 l on the diesel WMCGZ100-30E.
- Priming: fill the pump body with water through the filler port. Running dry damages the pump, and skipping these steps can void the warranty.
- In the box: two tapered hose connectors, a coarse strainer, an oil funnel, tools and a manual. Hoses are not on the list, so budget for them separately.
- After pumping dirty water, flush the pump with clean water, and drain the body before winter so frost cannot crack it.
Frequently asked questions
Which pump is best for dirty water?
A trash pump with a large port, such as the WEIMA 80-26: it passes solids up to 30 mm, has 80 mm ports and moves up to 78 m³/h. For all-day work with dirty water, consider the diesel WMCGZ100-30E.
Can I drain a basement with a clean-water pump?
Only if the water carries no silt or sand. Clean-water models pass solids up to 3 mm; with mud, choose a dirty-water pump.
How deep can the pump draw water from?
Plan on about 7 m between the pump and the water surface. Deeper than that you need a submersible or borehole pump, not an engine pump.
How much does a water pump cost?
In our shop from 689 zł (WEIMA 40-20) to 4399 zł (diesel WMCGZ100-30E), prices as of 24.10.2026.
How fast is delivery?
24–48 h for items in stock in our warehouse (Poland). We ship across Poland and to EU countries, with the manufacturer's warranty and a 14-day return period.
Not sure which model to pick? Call +48 577 058 408; we advise in Polish, Ukrainian and Russian. See all water pumps.