Question 1

How to prime the AL-KO HW 604 pump?

Accepted Answer

Priming your AL-KO HW 604 jet pump is an essential step before first use or after a prolonged stop. Here is the procedure:

Priming Steps:

Fill the pump body with clean water through the filling cap (usually located on the top or side of the pump).
Ensure that the check valve is functioning properly - water should not escape back.
Tightly close the filling cap after filling the pump body.
Connect the suction hose to the pump inlet (usually marked).
Start the motor and let the pump run for a few seconds. Water should start to flow normally at the outlet.

If water does not flow after a few seconds of operation, stop the pump and repeat the priming, ensuring that the pump body is completely filled with water and free of air bubbles.

Tip: A well-primed pump delivers a steady and consistent flow. If you notice fluctuations or interruptions, check the tightness of the connections and the presence of air in the piping.

Question 2

What are the technical data and specifications of this pump?

Accepted Answer

The AL-KO Jet 802 water pump is a medium-powered garden pump (800 W, 230 V / 50 Hz) designed for irrigation, drainage, and water transfer tasks. It offers interesting hydraulic performance with a maximum flow rate of 3400 liters/hour, a maximum delivery height of 38 meters (3.8 bars), and a maximum suction depth of 9 meters.

Main technical characteristics:

Maximum flow rate: 3400 liters/hour
Delivery height: 38 meters at 3.8 bars
Suction depth: 9 meters maximum
Power: 800 W
Power supply: 230-240 V, 50 Hz (compliant with DIN/VDE)
Weight: 8.5 kg (net)
Maximum water temperature: 35°C

Connections and operating characteristics: The suction and delivery connections are 1" threaded type (garden standard). The guaranteed noise level is 77 dB(A), making it relatively quiet for a pump in this category. The pump is equipped with an automatic thermal protection that cuts off the motor in case of overheating and restarts itself after 15-20 minutes of cooling.

Applications and compatible liquids: The Jet 802 is intended for pumping clear water, rainwater, and chlorinated water (pool water). It is perfectly suited for watering gardens, draining pools, filling tanks, and recovering water from wells or cisterns. However, it is not authorized for pumping drinking water, saltwater, wastewater, or corrosive liquids.

Maintenance and protection: Before each start, the pump must be filled with water to overflowing to avoid dry running, which would destroy the device. After use with chlorinated water or other liquids leaving residues, a rinse with clear water is necessary. To protect the pump during winter, it must be completely emptied using the drainage plug and stored in a frost-free place.

Warranty and service: The pump comes with a legal warranty, with wear parts excluded. It is manufactured by AL-KO Geräte GmbH (Germany), a renowned manufacturer in the field of professional quality garden equipment.

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