Viessmann 7133088 Oil Filter Insert W/O-Ring

The Viessmann 7133088 Oil Filter Insert is a fuel filtration component designed for oil-fired heating equipment. It is placed inside the oil filter assembly where it captures dirt, rust particles, and other impurities before the fuel reaches the burner. The included O-ring create a tight seal within the housing to prevent fuel leakage during operation. In HVAC systems it is commonly used in residential and heating units that rely on oil combustion, supporting clean fuel delivery and protecting internal burner components. It is typically replaced during scheduled to maintain consistent fuel flow and system stability.