Viessmann
Viessmann Heating Flow Return Isolation Valves 7829806
Viessmann heating flow, return and isolation valves, supplied as a set of two, for Vitodens 100-W WB1B boilers.
At a glance
- Also known as 2321080
£126.36
£105.30 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
These are the heating flow, return and isolation valves for Viessmann Vitodens 100-W WB1B appliances. They sit on the heating circuit connections and allow the boiler to be isolated from the system for servicing or component replacement. The set is supplied as two valves.
Signs this part needs replacing
- Visible weeping or dripping from the valve body or spindle
- Seized or stiff valve handle that will not turn through its full travel
- Valve fails to isolate the heating circuit, so the boiler cannot be shut off for servicing
- Corrosion or scale build-up around the valve connections
- Leaks at the valve union after the boiler has been drained and refilled
Before you order
- Confirm the appliance is a Vitodens 100-W WB1B and check the model and serial number against the list above
- Check whether the appliance is a combi or system version, as both are listed under different serial numbers
- Confirm that both flow and return isolation valves are required, as this set contains two valves
- Inspect the existing valves to identify which connection is leaking or seized before ordering
Compliance
| Alternative numbers | 2321080 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITODENS 100-W WB1B 26 KW COMBI SERIAL No. 7373061 | 47-819-12 | 47-819-12 | — | — |
| VIESSMANN VITODENS 100-W WB1B 26 KW SYSTEM SERIAL No. 7373060 | — | — | — | |
| VIESSMANN VITODENS 100-W WB1B 30 KW COMBI SERIAL No. 7373063 | 47-819-13 | 47-819-13 | — | — |
| VIESSMANN VITODENS 100-W WB1B 30 KW SYSTEM SERIAL No. 7373062 | — | — | — | |
| VIESSMANN VITODENS 100-W WB1B 35 KW COMBI SERIAL No. 7373065 | 47-819-14 | 47-819-14 | — | — |
| VIESSMANN VITODENS 100-W WB1B 35 KW SYSTEM SERIAL No. 7373064 | 41-819-20 | 41-819-20 | — | — |
Documents & drawings
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