Viessmann
Viessmann Safety Valve 3 Bar WB1B PRV 7833029
Viessmann 3 bar pressure relief safety valve for Vitodens 100-W combi and system boilers.
At a glance
- Also known as 2321236
£55.60
£46.33 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 Viessmann Safety Valve 3 Bar is a pressure relief valve for the Vitodens 100-W boiler family, covering both combi and system models. It opens at its 3 bar set pressure to discharge excess pressure from the heating circuit. The part carries the manufacturer reference 7833029 and the product designation WB1B PRV.
Signs this part needs replacing
- Water continuously weeping or discharging from the pressure relief pipework
- System pressure failing to hold, or rising and then dropping without explanation
- The valve failing to reseat and seal once system pressure returns to normal
- Scale, sludge or debris visible on the valve seat or outlet
- Corrosion, staining or damp traces around the valve body and its connection
Before you order
- Check the boiler model and serial number against the fits list above
- Confirm the appliance is a combi or system model from the Vitodens 100-W range
- Verify the existing valve is rated at 3 bar before ordering
- Confirm the manufacturer part number 7833029 matches the valve being replaced
Compliance
| Alternative numbers | 2321236 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITODENS 100-W BPJA 25 KW COMBI SERIAL No. 7501297 | 47-819-26 | 47-819-26 | — | — |
| VIESSMANN VITODENS 100-W BPJA 29 KW COMBI SERIAL No. 7501298 | 47-819-27 | 47-819-27 | — | — |
| 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 | — | — |
| VIESSMANN VITODENS WB1C 100-W 30KW GB COMBI SERIAL No. 7441745 | 47-819-21 | 47-819-21 | — | — |
Documents & drawings
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