
Filling Key Wiesberg Sauber CTFS 24 F Ref. 2695250439
When you open the filling tap of your boiler, you are using the Filling Key Wiesberg Sauber CTFS 24 F, reference 2695250439. This part allows you to replenish water to the heating circuit to maintain the proper pressure. If it fails, you will notice that you cannot refill the circuit or that the tap continuously leaks water, which causes an increase in pressure. It is compatible with the Wiesberg Sauber CTFS 24 F boiler, among others. It should be replaced when it shows leaks or difficulties in filling the circuit.
VAT included
Consult via WhatsAppWiesberg boilers compatible with reference 2695250439
Filling key with reference 2695250439. A proven compatibility: Sauber CTFS 24 F.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Wiesberg Sauber CTFS 24 F | Wiesberg | 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 the reference 2695250439 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 2695250439. 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 2695250439 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
When turning the knurled wheel to fill, water does not enter the circuit.
Cause: The internal metal mechanism may be jammed due to rust or limescale, preventing the flow even though the wheel turns.
Check that the network valve is open and that the wheel is actually operating the internal passage, not just turning without effect.
- 02
There is a constant drip coming from the nickel-plated body of the valve, even when it is closed.
Cause: The internal sealing gasket wears out over time and allows water to pass through even when the valve is closed.
Dry the area and observe for a few minutes with the boiler at rest; if the dripping comes from the body of the valve itself, it is the part.
- 03
The wheel is difficult to turn or has become stuck.
Cause: Being a metal part, scale and oxidation can seize the internal thread over time.
Apply a gentle rocking motion before forcing it; forcing a rusty thread can break the body of the valve.
- 04
The pressure keeps rising after closing the valve, without opening anything else.
Cause: The internal seat does not close completely and allows a small continuous flow to pass through.
Close it completely and check the manometer after 10-15 minutes without touching anything else to confirm if the closure is the problem.
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.
Fiche of the filling key Wiesberg 2695250439
- Catalogue reference
- 2695250439
- Brand
- Wiesberg
- Type of part
- Filling valves
- Units in stock
- 7 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days


