Description
Viessmann 7837231 Expansion Vessel CRI 8 for Vitodens 100 Boilers
The Viessmann 7837231 expansion vessel (CRI 8) is a genuine replacement part designed to regulate pressure within your boiler’s heating system.
It absorbs the expansion of heated water, preventing excessive pressure build-up and ensuring smooth and safe boiler operation.
Compatible Boilers (GC Numbers Included)
Viessmann Vitodens 100 WB1C Series
- 19kW System – 41-819-26
- 26kW Combi – 47-819-20
- 26kW System – 41-819-27
- 30kW Combi – 47-819-21
- 30kW System – 41-819-28
- 35kW Combi – 47-819-22
- 35kW System – 41-819-29
Viessmann Vitodens 100 WB1HA ERP Series
- 19kW System ERP – 41-819-36
- 26kW System ERP – 41-819-37
- 30kW System ERP – 41-819-38
- 35kW System ERP – 41-819-39
Viessmann Vitodens 100 WB1HC Series
- 19kW System – 41-819-40
- 26kW System – 41-819-41
- 30kW System – 41-819-42
- 35kW System – 41-819-43
Viessmann Vitodens 100 WB1KC Combi Series
- 26kW Combi – 47-819-40
- 30kW Combi – 47-819-41
- 35kW Combi – 47-819-42
Viessmann Vitodens 100 WBP Series
- 25kW Combi – 47-819-26
- 29kW Combi – 47-819-27
If you’re looking for any other different Viessmann Expansion Vessel, follow the link provided.
Why Choose This Product?
This Viessmann expansion vessel prevents damage from pressure spikes and thermal expansion. It helps ensure smooth boiler operation and protects internal components. You’ll avoid costly repairs by replacing worn or faulty vessels early.
Engineered by Viessmann, this part meets the highest performance standards. Backed by a 12-month warranty, it gives you reliable support and lasting value. Install this part to maintain your system’s pressure balance and safety.
Delivery and Return
Place orders before 1 PM for same-day dispatch via reliable couriers. Choose from standard or next-day delivery options. Returns are accepted within 30 days if the part is unused and in original packaging. Always use a Gas Safe registered engineer for installation and compliance.
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