1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your AL-KO DRAIN 20000 HD PREMIUM submersible dirty water pump. Please read this manual thoroughly before using the product to ensure proper function and to prevent damage or injury.
The AL-KO DRAIN 20000 HD PREMIUM is designed for pumping dirty water, featuring a robust stainless steel body for optimal corrosion protection and a powerful motor for high flow rates.
2. Safety Information
Always observe the following safety precautions to prevent personal injury or damage to the pump:
- Ensure the power supply matches the specifications on the pump's rating plate.
- Do not operate the pump with a damaged power cable or plug.
- Never lift or carry the pump by its power cable. Use the integrated handle.
- Do not pump flammable, explosive, or corrosive liquids.
- Keep children and unauthorized persons away from the operating pump.
- Disconnect the pump from the power supply before any maintenance, cleaning, or when not in use.
- Ensure adequate ventilation during operation.
- The pump is equipped with a magneto-thermal motor protector that automatically shuts off the pump in case of overheating. Allow 15-20 minutes for cooling before automatic restart.
3. Product Overview

This image displays a detailed view of the AL-KO DRAIN 20000 HD PREMIUM submersible dirty water pump. It highlights its robust black and red casing, the integrated float switch for automatic operation, and the connection point for the discharge hose. The design emphasizes durability and ease of connection.

Here, an individual is shown operating the AL-KO DRAIN 20000 HD PREMIUM pump, carefully lowering it into a pond. This illustrates the pump's application in natural water environments for drainage or transfer tasks, demonstrating its portability and ease of deployment.

This image depicts the AL-KO DRAIN 20000 HD PREMIUM pump submerged in water within a construction trench. It showcases the pump's capability for heavy-duty dewatering tasks in challenging environments, emphasizing its robust construction suitable for dirty water applications.
4. Setup
- Unpacking: Carefully remove the pump and all accessories from the packaging. Inspect for any signs of damage.
- Hose Connection: Attach a suitable discharge hose to the pump's outlet. The universal adapter allows connection of commercial hoses of various sizes. Ensure the connection is secure to prevent leaks.
- Float Switch Adjustment: The integrated attachment in the handle allows for simple and quick adjustment of the float cable. Adjust the float switch to set the desired ON and OFF levels for the pump. Ensure the float switch can move freely without obstruction.
- Placement: Place the pump on a stable, level surface in the water to be pumped. Ensure the pump is fully submerged if operating in automatic mode.
- Power Connection: Connect the power cable to a grounded electrical outlet that matches the pump's voltage requirements (230 V - 50 Hz).
5. Operating Instructions
- Automatic Operation: Once connected to power and submerged, the pump will automatically start when the water level rises and activates the float switch. It will stop when the water level drops and the float switch deactivates.
- Manual Operation (if applicable): For continuous operation regardless of water level, the float switch can often be secured in an 'up' position. Refer to specific instructions for your model if this feature is desired.
- Monitoring: Periodically check the pump's operation and the discharge flow. Ensure the pump is not running dry, as this can cause damage.
- Overheating Protection: If the pump overheats, the built-in thermal motor protector will shut it down. Allow the pump to cool for approximately 15-20 minutes before it automatically restarts. Identify and resolve the cause of overheating (e.g., blocked intake, low water level).
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your pump.
- Cleaning: After each use, especially when pumping dirty water, rinse the pump thoroughly with clean water to remove any debris or sediment.
- Inspect Intake: Regularly check the pump's intake screen for blockages. Clear any accumulated debris to maintain efficient flow.
- Cable and Plug Inspection: Periodically inspect the power cable and plug for any signs of damage, fraying, or cracks. Do not use the pump if damage is found.
- Float Switch Check: Ensure the float switch moves freely and is not obstructed by debris.
- Storage: When storing the pump for extended periods, ensure it is clean and dry. Store in a frost-free environment.
- Motor Maintenance: The hardened stainless steel motor shaft and stainless steel casing are designed for maintenance-free operation of the motor. No lubrication or specific motor maintenance is required.
7. Troubleshooting
This section addresses common issues you might encounter with your pump.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not start | No power supply; Float switch not activated; Motor protector tripped; Impeller blocked. | Check power connection; Adjust float switch position; Allow pump to cool; Clear any blockages from the intake. |
| Pump runs but no water is discharged or flow is low | Hose kinked or blocked; Intake screen blocked; Air lock in pump; Water level too low. | Check and clear hose; Clean intake screen; Submerge pump fully and restart; Ensure sufficient water level. |
| Pump stops during operation | Motor overheating (thermal protector tripped); Float switch deactivated (water level dropped). | Allow pump to cool (15-20 min); Check for blockages or low water level; Adjust float switch. |
| Unusual noise or vibration | Debris in impeller; Pump not stable. | Disconnect power and clear impeller; Ensure pump is on a stable surface. |
8. Specifications
| Feature | Specification |
|---|---|
| Model | DRAIN 20000 HD PREMIUM (Reference: 112836) |
| Power / Supply | 1300 W / 230 V - 50 Hz |
| Max Flow Rate | 20,000 Liters per hour |
| Max Head (Lift Height) | 10 Meters |
| Max Immersion Depth | 7 Meters |
| Max Particle Size | 38 mm |
| Outlet Pipe Diameter | 2" (59.61 mm) |
| Power Cable Length | 10 Meters |
| Weight | 9.76 Kilograms |
| Material | Steel (Stainless Steel Body and Motor Shaft) |
| Color | Red/Black/Silver |
9. Warranty and Support
AL-KO provides a standard warranty for this product. Additionally, you may be eligible for a 2+2 Years Warranty Extension upon online registration of your product. Please visit the official AL-KO website for details on warranty terms and conditions, and for product registration.
For technical support, spare parts, or service inquiries, please contact AL-KO customer service or an authorized service center. Refer to the AL-KO website or your purchase documentation for contact information.
AL-KO Official Website: www.al-ko.com





