Description
Viessmann Gas Valve 7828721 100-W WB1B
This Viessmann 100-W WB1B Gas Valve 7828721 ensures reliable gas flow regulation for consistent boiler performance. The boiler gas valve part number 7828721 helps maintain safe combustion and efficient operation. It plays a key role in controlling gas delivery to the burner, helping your system run smoothly.
Compatible Boilers
This part is compatible with the following models:
100-W WB1B Series
• 100-W WB1B 13kW Heat Only – GC 41-819-21
• 100-W WB1B 16kW Heat Only – GC 41-819-22
• 100-W WB1B 19kW Heat Only – GC 41-819-23
• 100-W WB1B 26kW Heat Only – GC 41-819-24
• 100-W WB1B 35kW Heat Only – GC 41-819-25
• 100-W WB1B 26kW Combi (Serial No. 7373061) – GC 47-819-12
• 100-W WB1B 30kW Combi (Serial No. 7373063) – GC 47-819-13
• 100-W WB1B 35kW Combi (Serial No. 7373065) – GC 47-819-14
• 100-W WB1B 26kW System (Serial No. 7373060) – GC 41-819-18
• 100-W WB1B 30kW System (Serial No. 7373062) – GC 41-819-19
• 100-W WB1B 35kW System (Serial No. 7373064) – GC 41-819-20
• 100-W WB1B 13kW Compact (Serial No. 7416307)
• 100-W WB1B 16kW Compact (Serial No. 7416302)
• 100-W WB1B 19kW Compact (Serial No. 7416303)
• 100-W WB1B 26kW Compact (Serial No. 7416304)
If you’re looking for a Viessmann 200-W B2HA Boiler Gas Valve or any other different Viessmann Gas Valve, follow the link provided.
Why Choose This Product?
This Viessmann gas valve restores consistent, safe control of gas flow within your boiler. It supports optimal heating efficiency and extends boiler life. As a refurbished part, it undergoes full functional testing to meet quality standards. The 12-month warranty provides extra confidence. This boiler gas valve is a smart replacement choice for Viessmann WB1B owners.
Delivery and Return
Place orders before 1 PM for same-day dispatch via trusted couriers. Choose from standard or next-day delivery services. Returns are accepted within 30 days if the part is unused and in its original packaging. Always use a Gas Safe registered engineer for installation and warranty validation.
FAQs
1. Which boilers are compatible with the Viessmann Gas Valve 7828721?
The gas valve 7828721 fits the 100-W WB1B series, including Heat Only, Combi, System, and Compact models. Specific models include 13kW, 16kW, 19kW, 26kW, 30kW, and 35kW variants across Heat, Combi, System, and Compact configurations. Always confirm your boiler model and serial number before purchasing.
2. What is the purpose of the gas valve in my boiler?
The gas valve controls the flow of gas to the burner, ensuring safe and consistent combustion. By regulating gas delivery, it helps the boiler operate efficiently, maintain stable heating, and prevent safety issues.
3. How long is the warranty on this gas valve?
This gas valve comes with a 12-month warranty covering any functional defects. The warranty ensures peace of mind and support for proper installation and operation.
4. Can I install this gas valve myself?
For safety and compliance, installation must be carried out by a Gas Safe registered engineer. Incorrect installation can lead to unsafe operation and may invalidate the warranty.
5. How do I ensure I am buying the correct gas valve for my boiler?
Check your boiler’s model, series, and serial number carefully. This gas valve is specifically for the 100-W WB1B series, including Heat Only, Combi, System, and Compact models. Refer to your boiler’s GC number to match it with the valve.













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