Threaded Mouthpiece Filling Key Saunier Duval SD223C/228/235 - Ref. 05236700

Saunier Duval boilers compatible with reference 05236700

Filling key with reference 05236700. 32 confirmed compatibilities: Combitek C 23 and Combitek F 23.

Proven compatibility

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. 05236700 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.

1. Find the reference printed on the installed part and check whether it matches the catalogue reference 05236700. If it is not visible, do not identify the part from its shape alone.
2. Check the full boiler model on its data plate and look for it in the model associations on this page.
3. Compare the connections and physical body with the original part before installation.
4. If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.

Symptoms and faults that the filling valve 05236700 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 refill the circuit, water also comes out from the outside, wetting the area.

  Cause: The filling valve is leaking and water is escaping from it instead of going into the circuit.

  Tighten the threaded connections with an open-end wrench, without forcing, and check the seals before replacing the entire part.

• 02

  The boiler does not build pressure even when the filling valve is left open for a long time.

  Cause: If the internal passage of the valve is blocked or the mechanism does not open completely, water does not reach the circuit.

  Check that the main shut-off valve of the house is open and that there is network pressure before replacing the filling valve.

• 03

  After closing it, the tap continues to drip or leak water.

  Cause: The internal seat of the filling valve does not close properly and allows water to pass through even when it is in the closed position.

  Close it completely and check in a few minutes if the dripping stops; if it persists with the valve tightly closed, confirm that the fault is in the valve and not in a nearby joint.

• 04

  It is very hard to turn the key; it feels stiff or jammed.

  Cause: Lime and water residues block the internal mechanism of the filling valve over time.

  Try moving the valve carefully several times and check for visible lime on the threads before forcing it or replacing it.

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 Saunier Duval 05236700

Catalogue reference

05236700

Brand

Saunier Duval

Type of part

Filling valves

Units in stock

4 units

Status

Refurbished

Warranty

1 year

Shipping

1-2 business days

Return

14 days