Description
Viessmann 7828646 Expansion Vessel CRI 8 – Compatible with 100-W WB1B Combi & System Boilers
This Viessmann expansion vessel is a direct replacement for faulty or leaking vessels in the 100-W WB1B boiler range. The CRI 8 boiler expansion tank helps regulate water pressure during heating cycles to protect your system. Part number 7828646 fits both combi and system models from the Vitodens 100-W WB1B series.
Compatible Boilers
This part is compatible with the following models:
Vitodens 100-W WB1B Combi
• 26kW (Serial No. 7373061) – GC 47-819-12
• 30kW (Serial No. 7373063) – GC 47-819-13
• 35kW (Serial No. 7373065) – GC 47-819-14
Vitodens 100-W WB1B System
• 26kW (Serial No. 7373060) – GC 41-819-18
• 30kW (Serial No. 7373062) – GC 41-819-19
• 35kW (Serial No. 7373064) – GC 41-819-20
If you’re looking for a Viessmann 7823844 Expansion Vessel CRI 8 or any other different Viessmann Expansion Vessel, follow the link provided.
Why Choose This Product?
The CRI 8 boiler expansion tank ensures reliable system performance while extending the life of your boiler. Viessmann’s original part offers easy installation, lasting durability, and pressure stability during heating cycles. Whether you choose new or refurbished, each unit is tested and covered by a 12-month warranty. It’s a smart replacement that supports long-term boiler efficiency.
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.
