
Filling Key Baxi Roca Victoria 24 24 Ref. 125566798
If you cannot refill water into the heating circuit or notice that the filling valve is continuously leaking water, you may need the Baxi Roca Victoria 24 Filling Valve, reference 125566798. This component allows you to add water to the system to recover the necessary pressure. Its failure can cause issues in the heating performance, as without the proper pressure, the system will not operate correctly. It is compatible with models such as Roca Victoria 24/24, Victoria 24/24 F, Victoria 24/24 T, among others. It is recommended to replace it when it shows leaks or does not function properly during filling.
VAT included
Consult via WhatsAppBaxi Roca boilers compatible with reference 125566798
Filling key with reference 125566798. Five confirmed compatibilities: VICTORIA 24/24 and VICTORIA 24/24 F.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Baxi Roca VICTORIA 24/24 | Baxi Roca Victoria 24/24 | Contrasted |
| Baxi Roca VICTORIA 24/24 F | Baxi Roca Victoria 24/24 | Contrasted |
| Baxi Roca VICTORIA 24/24 T | Baxi Roca Victoria 24/24 | Contrasted |
| Baxi Roca NEOBIT S 24/24 | Baxi Roca Neobit S 24/24 | Contrasted |
| Baxi Roca NEOBIT S 24/24 F | Baxi Roca Neobit S 24/24 | 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. 125566798 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 125566798. 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 125566798 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
The boiler is losing pressure and needs to be refilled every few days, although there are no visible puddles.
Cause: If the filling valve does not close properly, it allows water to escape slowly, which causes a loss of pressure.
Close the valve completely and observe the manometer for a few hours; if the pressure continues to drop, it is likely that this part is the cause.
- 02
A drop of water appears from the tap every time you open it to fill up.
Cause: The seals of the faucet wear out and allow water to escape when opened.
Dry the area before opening the valve and check if the drip comes from the body of the valve or from the connection, to avoid confusion.
- 03
The key control is very stiff or does not turn to refill.
Cause: The accumulation of limescale can block the internal mechanism if the tap is not used for a long time.
Try to move it carefully, without using tools; if it doesn't move, don't force it any further until you have a new spare part.
- 04
After filling, the pressure drops quickly in a short time.
Cause: If the non-return valve of the tap is not working, water may flow back into the network instead of remaining in the circuit.
Fill it, close the valve, and observe the pressure gauge for the first 10-15 minutes; a rapid drop indicates this problem and not a leak elsewhere.
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 Baxi Roca 125566798
- Catalogue reference
- 125566798
- Brand
- Baxi Roca
- Type of part
- Filling valves
- Units in stock
- 2 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days












