Filling Key Saunier Duval Thema Ref. 05174600

Saunier Duval boilers compatible with reference 05174600

Filling key with reference 05174600. 36 confirmed compatibilities: Thema C 23 A and Thema C 23 E.

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 the ref. 05174600 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 05174600. 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 05174600 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 pressure drops every week and it needs to be topped up more than usual.

  Cause: The filling valve does not close properly and allows water to escape to the drain without being noticeable from the outside.

  Close the valve tightly and check the pressure gauge level; if it has dropped within a day without any visible leaks, suspect the valve.

• 02

  When opening the valve to refill, the cap moves but no water enters the circuit.

  Cause: The internal stem may be broken or disconnected from the cap and rotate without actually opening the flow.

  Check that the main supply valve is open and that the inlet filter is not blocked before discarding the valve.

• 03

  There is a ring of lime or dry moisture around the stem, even though it is not dripping right now.

  Cause: They are remnants of previous leaks due to wear of the gasket, which may start to drip again with the working pressure or temperature.

  Clean the area and check after a complete heating cycle, which is when the joints expand the most and leaks usually appear.

• 04

  The cap is broken or cracked, and it's difficult to grip it to open or close the valve.

  Cause: Plastic ages with the heat from the boiler and becomes brittle over the years.

  Check if it is still possible to securely close the passage with pliers before deciding on the replacement.

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 05174600

Catalogue reference

05174600

Brand

Saunier Duval

Type of part

Filling valves

Units in stock

6 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.

Stem material

Brass

Manuals and technical documentation

Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.

• Saunier Duval Thema F 23 E Manual (PDF)Document © Saunier Duval, provided as a technical reference.