Viessmann Vitodens 100 WBP JA 29kW Combi Gas Valve – Pre-Owned | Part No. 7837918

When a Viessmann Vitodens 100 boiler experiences ignition faults, unstable combustion, pressure irregularities, or repeated lockout errors, the gas valve is a primary suspect. The Viessmann 100 WBP JA 29kW Combi Gas Valve (Part No. 7837918) is a tested pre-owned replacement that restores accurate gas flow regulation and stable burner performance, returning your Viessmann boiler to safe, efficient operation.

This is a pre-owned unit, inspected and tested before dispatch to confirm safe working condition. It provides a direct like-for-like fit for Viessmann Vitodens 100 WB1C 19kW, 26kW Combi and System, and WBP JA 25kW and 29kW Combi models — fitting without modification to existing pipework or controls.

Compatible Boiler Models

Key Features

• Viessmann part number 7837918 — direct OEM replacement for Vitodens 100 WB1C and WBP JA series
• Pre-owned: inspected and tested for correct gas flow control before dispatch
• Fits Vitodens 100 WB1C (19kW System, 26kW Combi/System) and WBP JA (25kW/29kW Combi)
• Resolves ignition faults, flame instability, pressure irregularities, and lockout errors
• 6-month warranty included

Delivery & Returns

Orders placed before 1:00 PM are dispatched the same working day. Standard and next-day delivery available at checkout. Returns accepted within 30 days if unused and in original packaging.

Important: Always use a Gas Safe registered engineer for installation.