Viessmann
Viessmann Gas Connection 7834978
Viessmann gas connection 7834978 for Vitodens 100-W 30 kW and 35 kW combi and system models.
At a glance
- Also known as 2322024
- Ensure the work is carried out by a Gas Safe registered engineer, with the gas line purged and tightness tested afterwards
£105.70
£88.08 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 gas connection (part number 7834978) is a gas-side connection component for Vitodens 100-W condensing appliances rated at 30 kW and 35 kW. It forms the gas inlet connection between the appliance and the incoming gas supply pipework. Viessmann lists it for both combi and system variants in the range.
Signs this part needs replacing
- A gas smell or a pressure drop recorded at the appliance gas inlet during a tightness test
- Visible corrosion, pitting or cracking on the connection body or its nut
- Cross-threaded, flattened or otherwise damaged sealing faces on the connection
- Weeping or staining around the joint once the gas supply is reinstated
- A connection that will not seat correctly when reused
Before you order
- Confirm the appliance model, output and serial number match the list above before ordering
- Check whether the existing gas supply pipework and isolation valve are being retained, as these are separate components
- Ensure the work is carried out by a Gas Safe registered engineer, with the gas line purged and tightness tested afterwards
Compliance
| Alternative numbers | 2322024 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITODENS 100-W B1HA 30 KW SYSTEM ERP SERIAL No. 7543423 | 41-819-38 | 41-819-38 | — | — |
| VIESSMANN VITODENS 100-W B1HA 35 KW SYSTEM ERP SERIAL No. 7543425 | 41-819-39 | 41-819-39 | — | — |
| VIESSMANN VITODENS 100-W B1HC 30 KW SYSTEM SERIAL No. 7570674 | 41-819-42 | 41-819-42 | — | — |
| VIESSMANN VITODENS 100-W B1HC 35 KW SYSTEM SERIAL No. 7570676 | 41-819-43 | 41-819-43 | — | — |
| VIESSMANN VITODENS WB1C 100-W 30 KW COMBI SERIAL No. 7499427 | 47-819-21 | 47-819-21 | — | — |
| VIESSMANN VITODENS WB1C 100-W 30 KW SYSTEM SERIAL No. 7499426 | 41-819-28 | 41-819-28 | — | — |
| VIESSMANN VITODENS WB1C 100-W 30KW GB COMBI SERIAL No. 7441745 | 47-819-21 | 47-819-21 | — | — |
| VIESSMANN VITODENS WB1C 100-W 35 KW COMBI SERIAL No. 7499429 | 47-819-22 | 47-819-22 | — | — |
| VIESSMANN VITODENS WB1C VITODENS 100-W 35 KW SYSTEM SERIAL No. 7499428 | 41-819-29 | 41-819-29 | — | — |
Documents & drawings
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