Vaillant 0020146731 EcoTEC Pro 24 & 28 Gas Valve Section With Venturi (Post 2012)

The Vaillant 0020146731 is a gas section with venturi, a combustion-path component used on Vaillant gas-fired water heaters. The venturi meters and accelerates the gas and air mixture as it enters the burner, so the section has a direct influence on ignition stability and combustion quality. It is supplied as a complete assembly for direct replacement of the original item.

• Unstable or lifting flame at the burner, or repeated lockouts during ignition
• Soot deposits or heat discolouration around the burner and heat exchanger
• Combustion readings drifting outside the appliance's stated CO and CO2 range
• Visible corrosion, distortion or obstruction in the venturi throat
• Weeping or staining at the gas section joints and seating faces

• Match the appliance model and, where shown, the GC number against part number 0020146731
• Inspect the gas section seating and any gasket or seal; renew if compressed, hardened or damaged
• Allow the appliance to cool and isolate the gas supply before dismantling the burner assembly
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.