Viessmann 100-W WB1B Gas Solenoid Valve 7828721

Description

The Viessmann 100-W WB1B Gas Solenoid Valve 7828721 is a genuine brand-new replacement gas solenoid valve designed for selected Viessmann Vitodens 100-W WB1B boilers. Supplied under manufacturer part number 7828721, this gas valve comes with a 12-month warranty. Before ordering, always confirm your boiler model, GC number, serial number and manufacturer part number to ensure compatibility.

The gas solenoid valve controls the gas flow within the boiler’s gas system, supporting safe ignition and burner operation. A faulty valve may cause ignition failure, flame loss, boiler lockouts or unreliable heating and hot water. As this component forms part of the boiler’s gas system, installation and testing should be completed by a suitably qualified Gas Safe registered engineer.

Product Details

Brand: Viessmann
Part Type: Gas Solenoid Valve
MPN: 7828721
Warranty: 12 Months
Condition: Genuine Brand New

Boiler Compatibility

The Viessmann 100-W WB1B Gas Solenoid Valve 7828721 is compatible with the following boilers.

Viessmann Vitodens 100-W WB1B – Heat Only

Fits Appliance GC No.
100-W WB1B 13kW Heat Only 41-819-21
100-W WB1B 16kW Heat Only 41-819-22
100-W WB1B 19kW Heat Only 41-819-23
100-W WB1B 26kW Heat Only 41-819-24
100-W WB1B 35kW Heat Only 41-819-25

Viessmann Vitodens 100-W WB1B – Combi

Fits Appliance GC No.

100-W WB1B 26kW Combi (Serial No. 7373061) 47-819-12 (7373061)
100-W WB1B 30kW Combi (Serial No. 7373063) 47-819-13 (7373063)
100-W WB1B 35kW Combi (Serial No. 7373065) 47-819-14 (7373065)

Viessmann Vitodens 100-W WB1B – System

Fits Appliance GC No.

100-W WB1B 26kW System (Serial No. 7373060) 41-819-18 (7373060)
100-W WB1B 30kW System (Serial No. 7373062) 41-819-19 (7373062)
100-W WB1B 35kW System (Serial No. 7373064) 41-819-20 (7373064)

Viessmann 100-WB1B – Compact

Fits Appliance GC No.

100-WB1B 13kW Compact (Serial No. 7416307) Information not provided
100-WB1B 16kW Compact (Serial No. 7416302) Information not provided
100-WB1B 19kW Compact (Serial No. 7416303) Information not provided
100-WB1B 26kW Compact (Serial No. 7416304) Information not provided

Before ordering, please check your boiler model, GC number, serial number and Viessmann manufacturer part number 7828721 to ensure this is the correct replacement part for your appliance.

Delivery & Collection

Collection is available from our Newcastle showroom at Unit 5, Penn Street, Newcastle upon Tyne, NE4 7BG, subject to stock availability. We also offer fast UK delivery via Royal Mail First Class or DPD Next Day, with most orders arriving within one to two working days. Boiler components should be installed by a suitably qualified Gas Safe registered engineer.

Warranty

This brand-new genuine Viessmann boiler gas solenoid valve is supplied with a 12-month warranty. Warranty claims may be subject to inspection and confirmation that the component was correctly selected and professionally installed.

Returns

We accept returns within 30 days of delivery. The product must be unused, unfitted and returned in its original unopened packaging with all seals intact. We cannot accept returns for components that have been fitted, used, damaged or returned in an unsuitable condition. Please check the boiler model, GC number, edition, serial-number range and part number carefully before ordering.

If you need any help, our team is happy to assist. Please contact us by phone or WhatsApp chat.

Frequently Asked Questions

Is the Viessmann 7828721 gas solenoid valve compatible with my boiler?

It fits the listed Viessmann Vitodens 100-W WB1B 13kW, 16kW, 19kW, 26kW and 35kW models, including selected Compact versions. Check your exact model, output and serial number before ordering.

What does the Viessmann 7828721 gas solenoid valve do?

The gas solenoid valve controls gas flow within the boiler’s gas system, supporting safe ignition and correct burner operation.

What symptoms can indicate a faulty gas solenoid valve?

Possible symptoms include ignition failure, flame loss, boiler lockouts or the burner failing to operate correctly. Other boiler components can cause similar symptoms, so professional diagnosis is recommended.

How can I confirm that 7828721 is the correct replacement?

Check your boiler model, output, GC number and serial number. Also confirm that Viessmann manufacturer part number 7828721 matches the original component or official appliance parts information.

Does the Viessmann 7828721 come with a warranty?

Yes. This genuine brand-new Viessmann gas solenoid valve comes with a 12-month warranty.