Honeywell VK8525M Gas Valve for Saunier Duval Themaclassic F25E · 4000126570
Gas mechanism of the boiler: modulating valve that regulates the gas flow to the burner, with an output marked 1.5–15 mbar. For the F 25 E, there are variants G20, natural gas, and G30; check the type of gas before selecting it.
- Type of part
- Gas valves
- Status
- Refurbished
- Catalogue reference
- 4000126570
- Warranty
- 1 year
VAT included Stock · 50 units
Compatible models
Check the listed models, version and part number before ordering the spare part.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Themaclassic F25E | Saunier Duval | Contrasted |
| 11P3 | Saunier Duval | Contrasted |
Models pending verification
These models are associated with this reference, but we have not finished verifying them yet, so we do not consider them compatibleIf your boiler is one of them, send us a photo of the part you are going to replace and we will verify it before you purchase.
| Saunier Duval Themafast F 25 E H-MOD | Saunier Duval | Unconfirmed |
|---|---|---|
| Saunier Duval Themaclassic F 24 E | Saunier Duval | Unconfirmed |
| Saunier Duval Isofast F 35 E H-MOD | Saunier Duval | Unconfirmed |
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 reference 4000126570 is the part for your boiler?
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Locate the valve designation "VK8525M" and compare 4000126570 and CE-1312BM3541 with your part.
- Check if there is a suffix after VK8525M (1045, 1052…) or R (regulator): this unit does not show it. Do not confuse it with 4000 126 571 (1052, propane).
- Confirm the gas of your boiler: the catalog of the F 25 E has a G20 mechanism (natural, S1071400) and another G30 (S1071500).
- Any questions? Send us a photo of your part's label and the boiler's rating plate from Contact.
Technical data
- Catalogue reference
- 4000126570
- Uniclima internal SKU
- VGAS001
- Brand
- Honeywell
- Type of part
- Gas valves
- Units in stock
- 50 pcs
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- Marked output
- 1.5-15mbar
- P.max marked
- 60mbar
- V1 marked
- 22Vdc
- V2 marked
- 24Vdc (6VA)
- Group and class marked
- 1 /B+B
- Marked origin
- Made in Czech Republic
- Inventory — Application indicated in inventory
- 11P3 Themaclassic F25E
- Inventory — Gas
- natural
- Inventory — Protection
- IP 20
- Output pressure data for the VK8525M
- 1.5–15 mbar · Label
- VK8525M — Maximum inlet pressure
- 60 mbar · Label; sheet EN1R-9184
- VK8525M — Safety opening data
- 22 Vdc ± 1.5 · Label (V1); sheet EN1R-9184
- VK8525M — Stepper motor
- 24 Vdc (−4/+6) · 6 W max. · EN1R-9184 sheet (copy)
- VK8525M — Pressure regulator data
- It does not include (the VK8525MR does) · Sheet EN1R-9184;;
- Identification — Marked designation
- VK8525M
- Identification — Marked code
- 4000126570
- Identification — Marked code
- CE-1312BM3541
- Technical data sheet — Marked output
- 1.5-15mbar
- Technical sheet: P.max marked
- 60mbar
- Technical sheet: V1 marked
- 22Vdc
- V2 marked
- 24Vdc (6VA)
- Technical sheet: Group and marked class
- 1 /B+B
- Technical sheet: Marked origin
- Made in Czech Republic
- Inventory data — Application indicated in inventory
- 11P3
- Inventory data — Gas
- natural
- Inventory data — Protection
- IP 20
- Inventory data — Application indicated in inventory
- Themaclassic F25E
- Pending applications to verify
- Registered data: Saunier Duval Themaclassic. It is a commercial mention without a complete model or equivalence of the actuator; pending.
Before purchasing
- To confirm: Saunier Duval Themafast F 25 E H-MOD — it is mentioned; only 2 indicate natural gas: (1045) and (1003/1510). The list with (1052) (propane) and (1510) does not indicate the gas.
- To confirm: Saunier Duval Themaclassic F 24 E — it is mentioned; only 2 indicate natural gas: (1045). The other 3 (.ca) provide it with the 1052 or the 1003.
- To confirm: Saunier Duval Isofast F 35 E H-MOD — they mention it; only 2 indicate natural gas: (1045). The list with 1052 (propane).
- Do not confuse: 4000 126 571 — VK8525M 1052 of propane — Only the last digit changes: compare gas and complete code.
- Do not confuse: S1079800 — Strap (5 pieces) of the stepper motor — The catalog lists it separately; it is not the gas valve.
- Do not confuse: VK8525MR — Version with pressure regulator — This unit marks VK8525M, without R.
- This unit marks VK8525M without suffix; they give 1045, 1052, 1003, and 1510 depending on the variant.
- VK8525M is connected to a Saunier Duval gas valve, but the suffix and gas contradict each other (1045 natural, 1052 propane, 1003, 1510). 4000126570 does not appear in the documentation. Registered confirmation: F25E and 11P3.
Frequently asked questions
Where is the code on the gas valve and what other markings should I compare?
The valve shows the designation "VK8525M", the reference 4000126570, and the CE marking 1312BM3541; also note the reference 4000/124/4751 of a 24 VDC subcomponent. Check if there is a suffix (1045, 1052…) or an R after VK8525M; this unit does not display one.
Is it compatible with my Themaclassic F25E or with another boiler?
For the Themaclassic F25E and the 11P3, yes: they have been confirmed. They also list the F25E; a review from 2018 is from a buyer who purchased the valve for a Themaclassic F25E: it is their experience, not a test. The Themafast F 25 E H-MOD, the Themaclassic F 24 E, and the Isofast F 35 E H-MOD are still to be confirmed: 2 for natural gas each; the Themafast adds (1052, propane) and does not indicate the gas. 4000126570 does not appear on the pages we have read. Another boiler: photo of the label and the PCB from Contact, or 911 17 77 77.
Is it for natural gas (G20) or for butane (G30)?
Confirmed: as natural gas. The catalog for the F 25 E lists S1071400 (G20, natural gas) and S1071500 (G30; the notice refers to G30 as butane). It links S1071400 to the VK8525M for natural gas; it titles 1052 "propane gas" and links it to S1071500.
What do VK8525M, the suffix, and 4000126570 mean compared to 4000 126 571?
VK8525M is the designation; with an R at the end (VK8525MR) it has a pressure regulator. The suffix indicates the variant: 1045 is for natural gas, 1052 for propane, and describes the 1510U as natural gas without a regulator. It sells the 1052 with reference 4000 126 571, which only changes in the last digit: the documentation does not explain it; compare the complete code and the gas.
Does a fault code F from the boiler indicate that this gas valve needs to be replaced and who should install it?
The official manuals for the Themaclassic F 25 E that we have read only state that the anomaly is displayed with an F code and a number on the screen; they do not relate those codes to the gas valve, and it does not include F15 or F16. Do not replace it solely based on a code: it is a part of the gas circuit and must be inspected and installed by a qualified technician.
Honeywell VK8525M Gas Valve for Saunier Duval Themaclassic F25E · 4000126570