Filling Key for Airsol HK124 Boiler - Ref. 3003201642
The filling valve for the Airsol HK124 boiler allows water to be replenished in the heating circuit, which is essential for maintaining the proper pressure in the system. If it fails, you will notice that you cannot refill the circuit or that it is continuously leaking water, which can lead to an increase in pressure. This model is compatible with other boilers from the Airsol brand, as well as with some models from Demrad and Heat, such as Aden, Kalisto, and Line HK B124, among others. It is recommended to replace it when it shows leaks or does not function properly.
VAT included
Consult via WhatsAppAirsol boilers compatible with reference 3003201642
Filling key with reference 3003201642. Seven confirmed compatibilities: HK124 and Aden.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Airsol HK124 | Airsol | Contrasted |
| Airsol Aden | Demrad | Contrasted |
| Airsol Kalisto | Demrad | Contrasted |
| Airsol Nitron | Demrad | Contrasted |
| Airsol Solaris | Demrad | Contrasted |
| Airsol Tayros | Demrad | Contrasted |
| Airsol Line HK B124 | Calor | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if ref. 3003201642 is the part for your boiler
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 3003201642. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms and faults that the filling valve 3003201642 resolves.
The filling valve allows water to refill the heating circuit. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
Water is leaking from underneath even though the control is completely closed.
Cause: The internal closing seat of the valve does not seal well with the cold boiler.
Press the control fully without forcing it and check if the dripping stops in a couple of minutes.
- 02
It's very difficult to move the control, as if it were seized up.
Cause: Limescale builds up over time in the internal mechanism and blocks the rotation.
Before replacing it, move it carefully several times; if it never gives way, confirm that the fault is mechanical and not pressure-related.
- 03
When opening the filling valve, the pressure of the boiler does not increase at all.
Cause: The internal passage is blocked by dirt or limescale, or no mains water is reaching the valve.
Check that there is network pressure available and that no other shut-off valve in the circuit is closed.
- 04
There is a constant leak in the threaded area of the valve, not in the handle.
Cause: The gasket or the valve body itself has deteriorated over time.
Dry the area and check if the moisture reappears right next to the valve thread.
These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.
Data sheet for the filling key Airsol 3003201642
- Catalogue reference
- 3003201642
- Brand
- Airsol
- Type of part
- Filling valves
- Units in stock
- 4 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Frequently asked questions about the filling key 3003201642
Is this filling valve suitable for a Demrad Kalisto boiler?
When should this filling valve be replaced?
Is the same key used for the Airsol HK124 and the Heat Line HK B124?
Spare parts related to Airsol Demrad
