Viessmann
Viessmann Hydraulic Block (System) 7833962
Viessmann hydraulic block (system) for Vitodens 100-W WB1B system boilers.
At a glance
- Appliance family: Vitodens 100-W WB1B
- Also known as 2321304
£884.16
£736.80 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The hydraulic block (system) is a Viessmann component used in the Vitodens 100-W WB1B range. It forms the water-carrying assembly within the appliance, integrating the hydraulic connections and flow paths that serve the system boiler's heating circuit. It is supplied as a complete assembly for service replacement.
Signs this part needs replacing
- Water weeping or visible staining around the hydraulic block body or its connections
- Persistent pressure loss on the heating circuit that cannot be traced to other components
- Debris, sludge or scale build-up restricting flow through the block
- Noise or poor circulation linked to a blocked or restricted hydraulic assembly
Before you order
- Confirm the boiler is a Vitodens 100-W WB1B system model, not a combi or open-vent variant
- Check the appliance output matches one of the 26 kW, 30 kW or 35 kW system models listed
- Verify the serial number on the boiler data badge against the fitment list
- Compare the part number on the existing component before ordering
Compliance
| Alternative numbers | 2321304 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITODENS 100-W WB1B 26 KW SYSTEM SERIAL No. 7373060 | — | — | — | |
| VIESSMANN VITODENS 100-W WB1B 30 KW SYSTEM SERIAL No. 7373062 | — | — | — | |
| VIESSMANN VITODENS 100-W WB1B 35 KW SYSTEM SERIAL No. 7373064 | 41-819-20 | 41-819-20 | — | — |
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
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