Zilmet Expansion Vessel Saunier Duval Micra 23 SE
When you open the tap or turn on the heating, the Zilmet expansion vessel Saunier Duval Micra 23 SE is responsible for absorbing the increase in water volume as it heats up. If this part fails, you will notice that the system pressure fluctuates sharply and, in some cases, the safety valve may leak. This expansion vessel is compatible with several models, including the Renova Micra 23 E, Renova Micra 23 SE, and Habitat Plus 23 E, among others. It is advisable to replace it if you experience those symptoms of pressure loss or if the membrane is broken.
VAT included
Consult via WhatsAppRenova boilers compatible with reference HE004002563
Expansion vessel with reference HE004002563. 13 verified compatibilities: Renova Micra 23 E and Renova Micra 23 SE.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Renova Renova Micra 23 E | Hermann | Contrasted |
| Renova Renova Micra 23 SE | Hermann | Contrasted |
| Renova Renova Micra 24 E | Hermann | Contrasted |
| Renova Renova Micra 24 SE | Hermann | Contrasted |
| Renova Micra 2 24 E | Hermann | Contrasted |
| Renova Micra 2 24-30 SE | Hermann | Contrasted |
| Renova MicraPlus 24 SE | Hermann | Contrasted |
| Renova Micra Condens 26 | Hermann | Contrasted |
| Renova Renova Habitat | Hermann | Contrasted |
| Renova Habitat Plus 23 E | Hermann | Contrasted |
| Renova Habitat Plus 23 SE | Hermann | Contrasted |
| Renova Habitat2 23 E | Hermann | Contrasted |
| Renova Habitat2 24 SE | Hermann | 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. HE004002563 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 HE004002563. 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 expansion vessel HE004002563 resolves.
The expansion vessel absorbs the expansion of water when heated. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
Loud banging noises can be heard in the pipes, especially when starting or stopping the boiler.
Cause: Without the expansion vessel dampening the pressure changes, water hammer is felt throughout the entire system.
Check that the automatic air vents of the radiators are not blocked and that no valve closes suddenly before touching the vessel.
- 02
The pressure on the manometer is not stable: it varies from day to day without any visible leaks.
Cause: A vessel without the correct pre-charge allows the circuit pressure to depend more than usual on the ambient temperature.
Record the cold pressure for two or three consecutive days; if it varies significantly without visible leaks, the expansion vessel is the first suspect.
- 03
The safety valve "blows" or drips occasionally when heating the boiler.
Cause: The expansion vessel no longer absorbs the expansion of the hot water, and the excess pressure seeks to escape through the gas valve.
Check the cold pressure of the circuit; if it is within normal limits and it still trips when heating, the expansion vessel becomes the main suspect.
- 04
When touching the tank from the outside, there is no noticeable temperature difference between the top and bottom parts.
Cause: In a healthy vessel, there is an air zone (colder) and a water zone (warmer); if everything is the same, it may be filled with water due to membrane rupture.
Compare the temperature of the upper and lower tank with the boiler running before deciding on the change.
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.
Expansion vessel datasheet Renova HE004002563
- Catalogue reference
- HE004002563
- Brand
- Renova
- Type of part
- Expansion vessels
- Units in stock
- 3 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- 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.
- Manufacturer (logo on the label)
- Zilmet
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Renova Micra 23 SE Manual (PDF)Document © Renova, provided as a technical reference.
Frequently asked questions about the expansion vessel HE004002563
Does this Zilmet expansion vessel fit a Saunier Duval Renova Micra 24 SE?
Can this Zilmet expansion vessel be installed on a Saunier Duval Micra 2 24 E?
What symptoms indicate that the expansion vessel of the Saunier Duval Habitat Plus 23 E needs to be replaced?
Is the reference VERM23SE the original from Saunier Duval?
How many models are compatible with this Zilmet expansion vessel?
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