Electric Submersible Pumps AL-KO

AL-KO submersible pumps can move large quantities of water in swimming pools, tanks, fountains, ponds, basements and wells. The brand was founded in 1931 in Kötz, Germany, when Alois Kober took over a small blacksmith’s workshop. During the 1950s, the company developed into an industrial business and began its international expansion in 1961. Today, its water management range includes submersible pumps for drainage, irrigation and water transfer. Four product families are available on AgriEuro, distinguished by the type of liquid and application:

• AL-KO clean water submersible pumps: designed to transfer clean water from swimming pools, tanks, fountains and swimming ponds. Some models provide flat suction, which is useful when a minimal amount of residual water must be left on the bottom;
• AL-KO dirty water submersible pumps: move water containing particles and are suitable for flooded cellars, ponds, tanks and rainwater collection systems. The impeller and internal passage are designed to allow debris compatible with the stated particle size to pass through;
• AL-KO clean and dirty water submersible pumps: combine flat suction with the ability to handle water containing particles. Depending on the model, the adjustable base allows operation to be adapted to the condition of the liquid;
• AL-KO deep-well pumps: draw clean water from wells, shafts and underground tanks, directing it towards irrigation systems or water outlets. Their slim design and multi-stage impeller system help generate a high delivery head;

On AgriEuro, AL-KO electric submersible pumps can be selected according to their main technical features, making it easier to identify the model suited to the type of water, height difference and quantity of liquid to be transferred. Power consumption should not be assessed on its own: flow rate, delivery head and maximum particle size determine the pump’s hydraulic performance.

• Type of water: clean water models operate with liquids containing no significant debris, while dirty water versions accept particles with dimensions compatible with the internal passage. Combined pumps can switch from one operating mode to the other using the adjustment provided on the model;
• Maximum flow rate: expressed in litres per hour, this indicates the theoretical quantity of water moved under favourable conditions. The actual value decreases as the height difference, hose length and pressure losses increase;
• Delivery head and pressure: the delivery head indicates the theoretical maximum height that the water can reach. Multi-stage deep-well models generate higher values than standard drainage pumps, which are designed for high flow rates at lower pressures;
• Maximum particle size: indicates the diameter of particles that can pass through the pump without obstructing it. Some AL-KO dirty water pumps accept debris up to 30 mm, but this value must always be checked in the specifications of the individual model;
• Immersion depth: defines the maximum permitted distance between the water surface and the pump. This parameter must be distinguished from the delivery head, which refers to lifting the liquid towards the delivery point;
• Float switch: detects the water level and automatically controls start-up and shutdown. This function limits dry running and allows drainage to be controlled without continuous intervention;
• Materials and motor protection: stainless-steel shafts, self-lubricating bearings and multiple seals provide resistance during immersion. When fitted, the thermal-magnetic motor protection device stops the motor if it overheats and allows it to restart after cooling;

Hobby-grade models are suitable for occasionally emptying swimming pools, tanks and small flooded rooms. Versions intended for heavy-duty hobby use are suitable for more frequent operating cycles, higher flow rates or irrigation applications requiring a greater delivery head.

The range includes drainage pumps, combined models and high-head electric pumps for deep wells. The choice depends on water cleanliness, the presence of particles, the volume to be transferred and the system’s height difference. Each family is therefore designed for different hydraulic conditions and applications.

AL-KO clean water submersible pumps are designed to transfer clean water or water containing minimal impurities. They can empty swimming pools, tanks, fountains, reservoirs and rooms where the water does not contain large particles. Suction from below helps remove liquid close to the floor; some models can leave a residue of only a few millimetres. The float switch starts and stops the pump according to the detected level, facilitating automatic emptying control. The high flow rate makes it possible to transfer large volumes quickly, although it decreases as the height difference increases. Before choosing a model, the flow curve should therefore be compared with the required delivery head. These electric pumps are also suitable for transferring collected rainwater, provided that the liquid complies with the temperature and cleanliness limits specified in the technical data sheet.

• Flat suction: reduces the residual level on the bottom and facilitates the emptying of paved surfaces. The minimum achievable depth varies according to the model and the position of the float switch;
• Recommended uses: swimming pools, tanks and fountains are suitable applications for this product family. Muddy water, sewage or coarse debris instead require a dirty water pump;

AL-KO dirty water submersible pumps are designed to drain liquids containing soil, fine sand and suspended particles within the permitted particle size. They are suitable for flooded cellars, ponds, excavations, rainwater pools and tanks containing sediment. The impeller geometry helps debris pass through without requiring the suction characteristics of a clean water pump. Some models in the range accept particles with a diameter of up to 30 mm and provide high flow rates at a limited delivery head. The robust housing, multiple seals and corrosion-resistant components support submerged operation. The float switch monitors the level and stops pumping when the water falls below the set threshold. However, these pumps are not suitable for chemically aggressive liquids, drinking water or substances with characteristics other than those specified by the manufacturer.

• Particle passage: the maximum permitted particle size must exceed the dimensions of the debris present in the water. An insufficient value may cause blockages and reduce the flow rate;
• Pump construction: a robust housing, resistant shaft and multiple seals protect the internal components during immersion. Cleaning after drainage limits the accumulation of sediment;

AL-KO clean and dirty water submersible pumps combine two operating modes in a single unit. Depending on the model, the adjustable base makes it possible to choose between flat suction and particle passage. In the clean water configuration, the pump draws liquid close to the bottom and leaves a reduced residue. In the dirty water configuration, the wider passage allows debris compatible with the stated particle size to pass through. This solution is suitable when the same pump must operate in a swimming pool, tank or flooded room under varying water conditions. The float switch controls automatic operation but may require sufficient free space to move. The flow rate and delivery head must be compared with the height difference and delivery hose diameter, as an unsuitable hose may limit performance.

• Adjustable base: allows the suction opening to be adapted to the quality of the water. The adjustment must be carried out according to the instructions provided for the individual model;
• Multiple applications: a single electric pump can be used for ordinary drainage and water containing particles. The selected mode must always match the actual condition of the liquid;

AL-KO deep-well submersible pumps draw clean water from wells, shafts, underground tanks and narrow reservoirs. The elongated body facilitates insertion into openings with a limited diameter, while the stainless-steel construction withstands prolonged contact with water. The multi-stage impeller system generates a higher delivery head than standard drainage pumps and supplies sprinklers or water networks located at a greater height. Some AL-KO models have a stated maximum delivery head of up to 55 metres, although the available flow rate decreases as the required pressure increases. Sizing must take into account the dynamic water level, height difference, pipe length and pressure losses. The maximum immersion depth must also be respected and the pump should be kept raised above the bottom to limit the entry of sand and sediment.

• Multi-stage impeller system: several impellers arranged in series increase the available delivery head. This configuration is suitable for irrigation and transferring water to higher points;
• Installation in the well: the pump must comply with the internal diameter, permitted depth and distances specified in the manual. Correct fastening and a suitable cable prevent stress on the electrical connection;

AgriEuro offers various models of AL-KO submersible pumps for drainage, water transfer and irrigation. The product data sheets make it possible to compare flow rate, delivery head, power, maximum particle size and immersion depth before purchasing.

• Fast and free delivery: orders are prepared and shipped directly from AgriEuro logistics centres, with no delivery costs for products covered by the service. Internal coordination makes it possible to monitor every stage, from parcel preparation through to delivery;
• Spare parts ordering service: available spare parts can be requested through the dedicated section of the user’s AgriEuro account. Identification by model and exploded drawing helps select the component compatible with the purchased pump;
• After-sales support: AgriEuro’s technical service provides attentive and personalised assistance after delivery. The online procedure allows information, images and documents useful for assessing the request to be submitted;

Buy the AL-KO submersible pump best suited to your needs from AgriEuro now.

AL-KO is a brand of German origin, founded in Kötz in 1931 and associated with AL-KO Geräte GmbH. The production facility may vary between models and sales periods; the exact country is stated on the rating plate, packaging or documentation of each pump.

There is no single average lifespan, as it depends on the operating frequency, pumped liquid, number of start-ups and correct installation. Periodic cleaning, compliance with the permitted particle size and protection against dry running help reduce wear on the impeller, seals and motor.

Power in watts must be assessed together with the flow rate and delivery head. For rapid emptying, the amount of water transferred per hour must be considered; for wells and irrigation, the height difference, required pressure and system pressure losses are more important.

In commercial terminology, the two terms are generally used as synonyms. “Submersible” describes a pump designed to operate while immersed, while “immersed” indicates that the unit operates below the liquid level. The relevant distinction instead concerns clean water, dirty water, drainage or high delivery head.

The theoretical pressure in bar is obtained by dividing the delivery head expressed in metres by approximately 10.2. A delivery head of 20 metres therefore corresponds to approximately 1.96 bar. In actual calculations, losses caused by the height difference, hose length and diameter, bends, fittings and required flow rate must be subtracted.