STHOR Dirty Water Pump 400W 79781 - Submersible, 7500 L/h, 5m Head, Float Switch, 10m Cable

After heavy rain, a flooded basement can quickly turn into a costly disaster. The STHOR 400W Dirty Water Pump is the reliable solution for homeowners and professionals who need to move large volumes of water fast. With a powerful 400W motor, it delivers a maximum flow rate of 7500 litres per hour, making short work of flooded cellars, construction sites, ponds, and drainage tasks. Its robust design handles dirty water containing particles up to 35mm, so you can pump out water with mud, sand, or small debris without clogging.

Key specifications

• Power: 400 W
• Voltage: 230V ~ 50Hz
• Max flow rate: 7500 L/h
• Max delivery height: 5 m
• Max submersion depth: 5 m
• Max particle size: 35 mm
• Outlet diameter: 1", 1-1/4", 1-1/2" (multi-adapter included)
• Cable length: 10 m
• Float switch: automatic
• Housing material: durable polypropylene
• Protection class: IPX8
• Max water temperature: 35°C
• Minimum water level for operation: 70 mm
• Pump type: submersible dirty water pump
• Motor type: electric
• Insulation class: B

Why choose it

The automatic float switch turns the pump on and off based on water level, preventing dry running and saving energy. The IPX8 waterproof rating means the pump can be fully submerged without risk, and the 10-metre power cable gives you flexibility in deep or distant sumps. The included multi-adapter fits three common hose sizes, so you can connect to your existing setup without extra purchases.

Ideal use cases

• Draining flooded basements and cellars
• Emptying swimming pools, ponds, or water tanks
• Construction site dewatering
• Transferring water from wells or cisterns
• Emergency flood cleanup

Good to know

This pump is designed for dirty water with particles up to 35mm, but it is not suitable for salt water, aggressive chemicals, or flammable liquids. Always ensure the pump is fully submerged before operation and clean the intake screen regularly to maintain performance. The durable polypropylene housing resists corrosion and impacts, ensuring long service life even in demanding conditions.