Expansion vessel 8L- DIFF pour Viessmann - 7837231
41646
€128.30
Colissimo
Delivery expected from 2026-09-25
Available
Delivery & returns
- ✓ Free delivery on orders over €79 in France
- ✓ Free returns within 30 days
The DIFF expansion tank is designed for use with Viessmann boilers. It is designed to handle changes in water volume caused by temperature fluctuations in the heating system. With a capacity of 8 litres, it maintains a stable pressure and effectively protects the system against overpressure, whilst also protecting the heating circuit.
Key features:
- Capacity: 8 litres
- Compatibility: Viessmann boilers
- Manufacturer’s reference: 7837231
Safety information:
Before performing any work, switch off the power supply to the unit and shut off the water and gas systems.
Additional information:
This part is an original spare part from parts manufacturer, it is labelled and packaged under the DIFF distribution brand
Features of product: EXPANSION VESSEL 8L- DIFF POUR VIESSMANN - 7837231
- Package Weight (kg)
- 4.51
- Package Height (m)
- 0.11
- Package Width (m)
- 0.4
- Package Length (m)
- 0.53
- Capacity (l)
- 8.00
- Logo Marque
- DIFF
- Number
- 1
- Origin
- Fabriqué en France
- Product type
- Vase d'expansion
Maintaining a Viessmann Boiler: Preserving Efficiency and Stability
A Viessmann boiler relies on a coherent system: heat exchanger, hydraulics, and regulation. During a breakdown or maintenance, functional compatibility is essential. An unsuitable part can lead to temperature fluctuations, short cycles, communication failures, or a significant drop in efficiency.
Viessmann DIFF° spare parts cover the most critical components: heat exchange, hydraulic elements, sensors, regulation, and safety devices. The goal is to restore stable operation, conforming to original parameters, without modification of the system.
Key Components for Effective Maintenance
Depending on the diagnosis, several parts are often involved:
-
Sensors and Probes: essential for accurate measurement and stable regulation (temperature, pressure).
-
Electronic Boards: in case of command, display, or communication failures between modules.
-
Exchangers / Hydraulic Components: to maintain effective thermal transfer and avoid performance losses.
Properly Identify Your Viessmann Model
To select the right part, rely on the exact reference of the boiler (nameplate) and, if possible, the reference printed on the original component. Versions may vary depending on the year and series.
Technical Advice: on condensing boilers, also check the environment (condensates, humidity): parts suitable for condensation constraints prevent repetitive breakdowns.
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