Viessmann
Viessmann Filling with Backflow Preventer 7506620
Viessmann filling with backflow preventer, part 7506620, for Vitodens 100-W combi boilers.
At a glance
- Also known as 2321342
£171.85
£143.21 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 Filling with Backflow Preventer is the filling assembly used on Vitodens 100-W combi boilers, carrying part number 7506620. It allows the heating circuit to be topped up from the mains supply while the integral backflow preventer stops system water from passing back into the mains. It sits within the boiler's isolation valve group.
Signs this part needs replacing
- Water weeping or dripping from the filling assembly when the boiler is running or the system is pressurised
- System pressure that will not hold and needs frequent topping up through the filling loop
- Visible scale, corrosion or debris around the filling connection
- Water passing back towards the mains supply rather than being contained in the heating circuit
Before you order
- Confirm the appliance model and serial number against the fits list above
- Check the part number on the existing component or in the boiler documentation matches 7506620
- Inspect the surrounding isolation valve group for related leaks before fitting
Compliance
| Alternative numbers | 2321342 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITODENS 100-W B1KF 26 KW COMBI SERIAL No. 7723181 | 47-819-50 | 47-819-50 | — | — |
| VIESSMANN VITODENS 100-W B1KF 30 KW COMBI SERIAL No. 7723182 | 47-819-51 | 47-819-51 | — | — |
| VIESSMANN VITODENS 100-W B1KF 35 KW COMBI SERIAL No. 7723183 | 47-819-52 | 47-819-52 | — | — |
| VIESSMANN VITODENS WB1C 100-W 26KW COMBI SERIAL No. 7499425 | 47-819-20 | 47-819-20 | — | — |
| VIESSMANN VITODENS WB1C 100-W 30 KW COMBI SERIAL No. 7499427 | 47-819-21 | 47-819-21 | — | — |
| VIESSMANN VITODENS WB1C 100-W 35 KW COMBI SERIAL No. 7499429 | 47-819-22 | 47-819-22 | — | — |
Documents & drawings
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