Saunier Duval Injector G25 + Disc 0020021620

The Saunier Duval injector G25 with disc, part number 0020021620, is a burner component used to meter and direct the gas supply into the burner on Saunier Duval gas boilers. It is listed for the 30kW output band and is supplied with its disc. It sits within the burner assembly and directly affects flame shape, ignition reliability and combustion performance.

• Weak, lazy or uneven burner flame across the burner surface
• Delayed, noisy or repeated ignition attempts
• Soot deposits or discolouration around the burner and injector area
• Combustion readings drifting outside the expected range for the appliance
• Visible blockage, corrosion or damage to the injector orifice or disc

• Confirm the appliance model and GC number against the manufacturer's parts list
• Check the injector marking on the existing part matches the G25 designation
• Confirm how many injectors the burner requires, as more than one may be fitted
• Work on gas-carrying components must be carried out by a Gas Safe registered engineer