Q: Can the float of the HWA 4000 Comfort pump be removed and cleaned?

Yes, the float (float body) can be removed for cleaning. This is a standard maintenance operation for the HWA 4000 Comfort pump. Steps for removal and cleaning According to the pump manual (page 37, section "Float body"): Before removal: Take note of the mounting position of the float body. This is essential for correct reinstallation. Disassembly: Unscrew the threaded connection with gasket located on the pressure line. Cleaning: Remove the float body and clean it (rinse with water). Reassembly: Reinstall the float body, strictly adhering to the mounting position noted in step 1. Important point: The correct position of the float is crucial for the proper functioning of the pressure sensor. Do not overlook this step.

Q: The pump stops - is there an electrical fuse or protection?

The AL-KO HW 4500 FCS Comfort pump has several electrical and thermal protection systems that can stop operation: Electrical protections A residual current circuit breaker (fault current A 10 A protection circuit breaker and a 10/30 mA residual current circuit breaker are required for installation In case of a stop, first check the fuses and the power supply Integrated thermal protection A thermal protection switch automatically stops the motor in case of overheating. Restart occurs after a cooling period of 15 to 20 minutes . Dry running protection The pump automatically stops after 90 seconds without water suction and triggers a LED alarm. Check the ALARM indicator (the red light): if it is on, it indicates a malfunction. If not, wait 20 minutes and try again, or check that the power supply and circuit breaker are properly activated.

Q: When should the tank pressure be set to 1.7 bar?

The tank pressure must be set to 1.7 bar before each startup of the AL-KO HW 4500 FCS Comfort. This adjustment is mandatory because the domestic pumping station can only operate correctly with a membrane supply pressure between 1.5 and 1.7 bar in the tank. Steps to adjust the tank pressure: Open the valve cover located at the back of the tank Check the air pressure at the valve using an air pump or a tire inflator equipped with a pressure gauge Adjust the air pressure between 1.5 and 1.7 bar if necessary Reattach the valve cover at the back of the tank Once this pressure is correctly set to 1.7 bar, the pump can be put into operation. The tank pressure controls the automatic switch that manages the starting and stopping of the pump according to water needs. During use: The pump stops and restarts automatically according to the pressure in the tank. Do not change the setting once use has begun. Regular maintenance: Regularly check that the air pressure is never below 1.5 bar minimum . Too low a pressure causes the pump to cycle excessively and reduces its efficiency. In case of pressure loss, inflate the tank to 1.7 bar with an air pump or tire inflator. Before long-term storage: Before winterizing or storing for more than a few weeks, completely drain the tank and system to prevent damage from freezing.

Q: Does the pressure in the tank decrease when there is no water in the pump?

Yes, the pressure in the tank gradually decreases when the pump operates without a water supply. Here’s why and what you need to know: Pressure Behavior Normal required pressure : 1.5 to 1.7 bar (to be checked regularly via the valve at the back of the tank) Pressure drop : If the pump continues to operate without water input, the tank will gradually depressurize Risk of damage : A pump running dry (without water) can cause internal damage to the mechanical parts Automatic Protection: Safety Shut-off To avoid this problem, the AL-KO HW 4500 FCS Comfort pump has a dry running protection : it automatically shuts off after 90 seconds without water suction. The LED display then indicates ALARM . What You Should Do Always fill the pump body with water before each start-up Check that your water source (well, tank, basin) contains enough water If the pump stops on alarm, check the water level and wait a few seconds before restarting it

Q: Why does my AL-KO HW 4500 pump stop when I fully open the outlet tap?

This is a completely normal behavior for this pump. Your AL-KO HW 4500 FCS Comfort is equipped with an automatic pressure switch that controls the starting and stopping of the motor according to the programmed pressure levels. Here’s what happens: When the tap is fully open , the nominal flow rate (4500 L/h) is at its maximum. The outlet pressure drops and falls below the pressure switch threshold - the pump stops to protect the circuit. When the tap is partially open , the flow rate is reduced and the pressure increases. It remains above the pressure switch threshold - the pump continues to operate normally. This mechanism is an integrated protection . It extends the motor's lifespan by preventing overloads at low flow rates and ensures optimal pressure in the water discharge circuit. You can therefore use your pump with peace of mind: its design works as intended.

Question 1

Does the AL-KO HWA 3600 pump include a plastic key for the filter? How can I obtain one?

Accepted Answer

No, the AL-KO HWA 3600 pump does not come with a specific plastic key in its packaging. According to the manual for this pump, you simply need a "suitable tool" to unscrew and remove the filter cover during maintenance.

What tool to use?

The filter cover of the HWA 3600 has notches that allow you to use:

A standard flat screwdriver
A flat or socket wrench
Any similar tool that fits the notches of the cover

Buying a key separately

If you want a dedicated key for this pump, you can:

Contact AL-KO directly or an authorized AL-KO dealer to order a specific filter key (provided with the AL-KO suction set for this reference)
Consult an authorized AL-KO spare parts dealer, who can offer you the official parts and accessories for the HWA 3600

The exact part number for the plastic key is not specified in the official notice.

Question 2

How to unscrew and clean the filter cover on the AL-KO HWA 3600 pump?

Accepted Answer

To clean the filter of your AL-KO HWA 3600 pump, follow this procedure:

Removing the cover

Preparation: First unscrew the drain screw (reference 01-03/8) and drain the filtering compartment
Cover: Unscrew the filter cover (05/4). If the cover is stuck, insert an appropriate tool (flat screwdriver, open-end wrench) into the notches provided for this purpose on the filtering glass
Removing the filter: Take the filter (05/8) out of the pump body (01-03/6)

Cleaning and reassembly

Clean the filter under running water
Check the condition of the seal (05/5): if it is damaged or worn, replace it
Reinsert the filter into its housing, then screw the transparent cover back on and tighten firmly by hand

Important: The cover does not come with a dedicated key. Use a flat screwdriver or an open-end wrench that fits the notches of the cover to facilitate its removal if necessary.

Question 3

Can the AL-KO HWA 3600 pump draw water from a depth of 6 meters?

Accepted Answer

No, this pump cannot effectively draw water from a depth of 6 meters. According to the technical manual, the maximum recommended suction height for the AL-KO HWA 3600 is 4 meters.

This is why your pump is not drawing water from your well.

Possible solutions

Use a larger suction hose: If you absolutely need to exceed 4 m, the manual states that you should install a suction hose with a diameter of greater than 1" (for example, 1.5" or 2"). This reduces pressure losses and may slightly improve performance, but does not guarantee reliable operation at 6 meters.
Reduce the depth: Install the pump at a depth closer to the well (less than 4 meters) or use a specialized submersible pump for deep wells.
Change model: If you need to draw from more than 4 meters, check the AL-KO submersible pump models or a higher power pump designed for deep wells.

Question 4

How to properly prime the AL-KO HWA 3600 pump when water leaks during filling?

Accepted Answer

The leaking issue during filling indicates that the pump is not properly primed. Here is the precise priming procedure for the HWA 3600 pump:

Correct Priming Procedure

Open the filling screw located on the body of the pump
Fill with water through the filling screw until full - the pump body must be completely full (not just 30%)
Tighten the filling screw securely - check that the sealing gasket is intact and that the screw is well tightened

Tip to Speed Up Priming

Before starting, also fill the suction hose with water if possible. This allows the pump to immediately draw water without waiting for the air to escape, significantly reducing the initial priming time.

Starting Up After Priming

Once the pump is properly primed:

Open all closures (valves, taps)
Plug the power plug into a wall socket protected by a 10 A circuit breaker
The pump automatically starts its suction cycle

Important: Running dry damages the pump. Proper priming with water to the brim is essential before each first startup.

Question 5

Can the float of the HWA 4000 Comfort pump be removed and cleaned?

Accepted Answer

Yes, the float (float body) can be removed for cleaning. This is a standard maintenance operation for the HWA 4000 Comfort pump.

Steps for removal and cleaning

According to the pump manual (page 37, section "Float body"):

Before removal: Take note of the mounting position of the float body. This is essential for correct reinstallation.
Disassembly: Unscrew the threaded connection with gasket located on the pressure line.
Cleaning: Remove the float body and clean it (rinse with water).
Reassembly: Reinstall the float body, strictly adhering to the mounting position noted in step 1.

Important point: The correct position of the float is crucial for the proper functioning of the pressure sensor. Do not overlook this step.

Question 6

What accessories should I buy for the AL-KO BMP 14001 pump?

Accepted Answer

To accompany your AL-KO BMP 14001 pump, several accessories and consumables may be useful depending on your usage:

Essential Accessories

Suction Hose - Essential for drawing water from the source (well, tank, pond). Usually partially provided, but you may need extensions.
Discharge Hose - To transport water to your destination (watering, filling, drainage). Extensions of 20 or 25 mm are often necessary.
Filters - Suction or motor protection filters help increase the pump's lifespan by filtering out impurities.
Check Valve - Useful if you interrupt use, to prevent the hose from emptying.

Recommended Accessories

Fittings and Adapters - To adapt pipe diameters or connect additional devices.
Spare Parts - Seals, bearings, or turbines specific to the BMP 14001 model (consult the specific spare part with the AL-KO distributor).
Pump Stand or Support - For a stable and secure installation.

Tip: refer to the complete user manual of your BMP 14001 for the exact inventory of compatible accessories and the recommended dimensions of hoses (specific diameter references are indicated there).

Question 7

The pump stops - is there an electrical fuse or protection?

Accepted Answer

The AL-KO HW 4500 FCS Comfort pump has several electrical and thermal protection systems that can stop operation:

Electrical protections

A residual current circuit breaker (fault current < 30 mA) must be installed upstream
A 10 A protection circuit breaker and a 10/30 mA residual current circuit breaker are required for installation
In case of a stop, first check the fuses and the power supply

Integrated thermal protection

A thermal protection switch automatically stops the motor in case of overheating. Restart occurs after a cooling period of 15 to 20 minutes.

Dry running protection

The pump automatically stops after 90 seconds without water suction and triggers a LED alarm.

Check the ALARM indicator (the red light): if it is on, it indicates a malfunction. If not, wait 20 minutes and try again, or check that the power supply and circuit breaker are properly activated.

Question 8

When should the tank pressure be set to 1.7 bar?

Accepted Answer

The tank pressure must be set to 1.7 bar before each startup of the AL-KO HW 4500 FCS Comfort. This adjustment is mandatory because the domestic pumping station can only operate correctly with a membrane supply pressure between 1.5 and 1.7 bar in the tank.

Steps to adjust the tank pressure:

Open the valve cover located at the back of the tank
Check the air pressure at the valve using an air pump or a tire inflator equipped with a pressure gauge
Adjust the air pressure between 1.5 and 1.7 bar if necessary
Reattach the valve cover at the back of the tank

Once this pressure is correctly set to 1.7 bar, the pump can be put into operation. The tank pressure controls the automatic switch that manages the starting and stopping of the pump according to water needs.

During use: The pump stops and restarts automatically according to the pressure in the tank. Do not change the setting once use has begun.

Regular maintenance: Regularly check that the air pressure is never below 1.5 bar minimum. Too low a pressure causes the pump to cycle excessively and reduces its efficiency. In case of pressure loss, inflate the tank to 1.7 bar with an air pump or tire inflator.

Before long-term storage: Before winterizing or storing for more than a few weeks, completely drain the tank and system to prevent damage from freezing.

Question 9

Does the pressure in the tank decrease when there is no water in the pump?

Accepted Answer

Yes, the pressure in the tank gradually decreases when the pump operates without a water supply. Here’s why and what you need to know:

Pressure Behavior

Normal required pressure: 1.5 to 1.7 bar (to be checked regularly via the valve at the back of the tank)
Pressure drop: If the pump continues to operate without water input, the tank will gradually depressurize
Risk of damage: A pump running dry (without water) can cause internal damage to the mechanical parts

Automatic Protection: Safety Shut-off

To avoid this problem, the AL-KO HW 4500 FCS Comfort pump has a dry running protection: it automatically shuts off after 90 seconds without water suction. The LED display then indicates ALARM.

What You Should Do

Always fill the pump body with water before each start-up
Check that your water source (well, tank, basin) contains enough water
If the pump stops on alarm, check the water level and wait a few seconds before restarting it

Question 10

Why does my AL-KO HW 4500 pump stop when I fully open the outlet tap?

Accepted Answer

This is a completely normal behavior for this pump. Your AL-KO HW 4500 FCS Comfort is equipped with an automatic pressure switch that controls the starting and stopping of the motor according to the programmed pressure levels.

Here’s what happens:

When the tap is fully open, the nominal flow rate (4500 L/h) is at its maximum. The outlet pressure drops and falls below the pressure switch threshold - the pump stops to protect the circuit.
When the tap is partially open, the flow rate is reduced and the pressure increases. It remains above the pressure switch threshold - the pump continues to operate normally.

This mechanism is an integrated protection. It extends the motor's lifespan by preventing overloads at low flow rates and ensures optimal pressure in the water discharge circuit. You can therefore use your pump with peace of mind: its design works as intended.

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