The Viessmann 7874312 Ignition Electrode with Gasket is a replacement ignition component designed for Viessmann gas-fired boilers, including Vitocrossal 300 CU3A and compatible Vitodens 300-W models. It generates the electrical spark required to ignite the burner’s gas-air mixture, supporting dependable startup and stable boiler operation. The included gasket helps provide a secure se... https://www.partshnc.com/viessmann-7874312-ignition-electrode-w-gasket