
Filling Key Fagor Contract CE 20E 1N Ref. MU1284700
The Fagor Contract CE 20E 1N Filling Valve Ref. MU1284700 is a ball valve designed to replenish water to the heating circuit and recover pressure. If it malfunctions, the user will notice that the circuit cannot be refilled or that it is continuously leaking water, which can lead to an increase in pressure. This part is compatible with Fagor boilers from the FE range, such as the FE 24 NOX model, as well as from the FA and CA ranges, including models like FA20E2N and CE20E. It should be replaced when leaks or difficulties in refilling the circuit are detected.
VAT included
Consult via WhatsAppFagor boilers compatible with reference MU1284700
Filling key with reference MU1284700. Five confirmed compatibilities: FE 24 NOX and FA20E2N.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Fagor FE 24 NOx | Fagor FE | Contrasted |
| Fagor FA20E2N | Fagor FA | Contrasted |
| Fagor FA23E | Fagor FA | Contrasted |
| Fagor CA24EN | Fagor CA | Contrasted |
| Fagor CE20E | Fagor CE | 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. MU1284700 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 MU1284700. 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 MU1284700 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 opening the valve to recharge pressure, the pressure gauge rises very slowly or almost not at all.
Cause: The internal ball-type sphere is blocked by lime or dirt residues from the circuit.
Open and close several times and see if you notice more resistance than normal when turning or if the water flow is weak.
- 02
Lime deposits or moisture appear around the body of the valve.
Cause: It usually indicates that there has been a small and constant drip for some time, even if it goes unnoticed.
Completely dry the area and check it again several hours later to confirm if the moisture reappears.
- 03
The pressure in the circuit drops slowly but continuously, day after day.
Cause: The valve does not close completely watertight and gradually lets water seep into the boiler.
Close the valve completely and monitor the pressure gauge for several hours to see if the pressure drop stops.
- 04
The handle is difficult to turn or has broken when trying to do so.
Cause: The material of the handle becomes brittle over the years and due to proximity to heat.
Turn it carefully, without forcing it, to check if it responds or if it's already broken inside.
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 Fagor MU1284700
- Catalogue reference
- MU1284700
- Brand
- Fagor
- Type of part
- Filling valves
- Units in stock
- 4 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- Type
- Ball valve
- Body finish
- Nickel plating
- Handle
- Dark blue plastic












